Free Online Developer Tools
A suite of 536+ hyper-fast utilities — JSON formatter, Base64, hashing, converters, generators & more. 100% private & client-side: every tool runs locally in your browser, so your data never touches a server.
Formatters & Validators
Clean, format, validate, and compare your raw code and text structures.
JSON Formatter
Format, validate, and beautify JSON payloads.
Text Diff / Compare
Side-by-side or unified line/character diff comparison tool.
XML Formatter
Beautify and indent XML strings.
Minifier Suite
Minify HTML, CSS, and JS by stripping comments and whitespace.
Markdown Converter
Convert Markdown to HTML with live preview.
CSS Formatter
Beautify and indent minified or messy CSS.
HTML Formatter
Beautify and indent raw HTML markup.
SQL Formatter
Format SQL queries with keyword casing and indentation.
YAML Formatter
Validate and normalize YAML indentation.
Credit Card Validator
Validate card numbers with the Luhn check and detect the brand.
Email Validator
Check whether an email address is well-formed.
IP Address Validator
Validate and classify IPv4 and IPv6 addresses.
IBAN Validator
Validate an IBAN with the ISO 7064 mod-97 checksum, and see its country and formatted form.
ISBN Validator
Validate ISBN-10 and ISBN-13 book numbers with their checksum digit.
TOML Formatter
Format and validate TOML files online. Paste your TOML to check for errors, normalise indentation, and view the parsed structure as JSON.
JSON Minifier
Minify JSON by removing all whitespace and comments. Shows original vs minified byte sizes and savings percentage. No upload needed.
JSON Schema Validator
Validate JSON data against a JSON Schema (Draft 7) — checks type, required fields, enum, min/max, and nested objects.
XML Validator
Validate XML syntax online — checks tag matching, attribute quotes, and well-formedness without a server.
Converters
Transform data between formats — JSON, YAML, CSV, XML, and more.
JSON to YAML
Convert JSON into clean, readable YAML instantly.
YAML to JSON
Convert YAML configuration into valid JSON.
JSON to CSV
Flatten a JSON array of objects into CSV rows.
CSV to JSON
Parse CSV with headers into a JSON array of objects.
JSON to XML
Convert JSON structures into nested XML markup.
JSON to SQL
Turn a JSON array of objects into SQL INSERT statements.
CSV to XML
Convert CSV rows into structured XML records.
XML to CSV
Flatten repeated XML records into CSV rows.
INI to JSON
Parse INI config sections and keys into JSON.
JSON to INI
Serialize a JSON object into INI config format.
CSV to Markdown Table
Convert CSV data into a GitHub-style Markdown table.
XML to JSON
Convert XML markup into a structured JSON object.
Number to Words
Spell out numbers in English words.
CSV to SQL
Turn CSV rows into SQL INSERT statements.
Decimal to Binary Converter
Convert decimal (base 10) numbers to binary (base 2).
Binary to Decimal Converter
Convert binary (base 2) numbers to decimal (base 10).
Decimal to Hex Converter
Convert decimal (base 10) numbers to hexadecimal (base 16).
Hex to Decimal Converter
Convert hexadecimal (base 16) numbers to decimal (base 10).
CSV Cleaner
Trim whitespace, drop empty rows, and de-duplicate CSV data.
CSV to HTML Table Converter
Turn CSV data into a ready-to-paste HTML <table>.
Decimal to Octal Converter
Convert decimal (base 10) numbers to octal (base 8).
Octal to Decimal Converter
Convert octal (base 8) numbers to decimal (base 10).
Binary to Hex Converter
Convert binary (base 2) numbers to hexadecimal (base 16).
Hex to Binary Converter
Convert hexadecimal (base 16) numbers to binary (base 2).
CSV to TSV Converter
Convert comma-separated values to tab-separated values.
TSV to CSV Converter
Convert tab-separated values to comma-separated values.
Scientific Notation Converter
Convert numbers between decimal and scientific (E) notation.
JSON to Query String Converter
Turn a flat JSON object into a URL query string.
Query String to JSON Converter
Parse a URL query string into a JSON object.
Octal to Binary Converter
Convert octal (base 8) numbers to binary (base 2).
HTML to JSX Converter
Convert HTML to JSX — class to className, inline styles to objects, and self-closed tags.
JSON to Go Struct
Generate Go structs with JSON tags from a sample JSON object.
SVG to Data URI
Encode an SVG into a URL-encoded or base64 data URI for CSS or img src.
JSON to PHP Array
Convert JSON into a ready-to-paste PHP array using modern short-array syntax.
Seconds to Time Converter
Convert a number of seconds into HH:MM:SS and a human-readable duration.
Centimeters to Inches
Convert centimeters to inches instantly, with a feet-and-inches breakdown and a quick reference table.
Inches to Centimeters
Convert inches to centimeters instantly, with a quick reference table for common values.
Kilograms to Pounds
Convert kilograms to pounds (lb) instantly, with a quick reference table for common weights.
Pounds to Kilograms
Convert pounds (lb) to kilograms instantly, with a quick reference table for common weights.
Binary to Octal Converter
Convert binary (base 2) numbers to octal (base 8).
Hex to Octal Converter
Convert hexadecimal (base 16) numbers to octal (base 8).
Octal to Hex Converter
Convert octal (base 8) numbers to hexadecimal (base 16).
JSON to Rust Struct
Generate Rust structs with serde Serialize / Deserialize derives from a JSON sample.
HTML to Markdown Converter
Convert HTML markup into clean, readable Markdown without a server.
JPG to PNG Converter
Convert JPEG images to lossless PNG format instantly in your browser.
PNG to JPG Converter
Convert PNG images to JPEG with a quality slider to control file size.
Image to WebP Converter
Convert PNG, JPG, or GIF to modern WebP format with quality control — no upload.
SVG to PNG Converter
Render an SVG file to a PNG raster image at any size — entirely in your browser.
WebP to PNG Converter
Convert WebP images to lossless PNG format in your browser — no upload needed.
JPG to WebP Converter
Convert JPEG photos to WebP format for smaller web-optimized images.
PDF Merge
Combine multiple PDF files into one. Reorder files before merging — nothing is uploaded.
PDF Split
Extract specific pages or page ranges from a PDF. Runs entirely in your browser.
PDF Rotate
Rotate all or specific pages in a PDF by 90°, 180°, or 270°. Client-side — no upload.
PDF Page Remover
Select and delete specific pages from a PDF — click to mark, then download the trimmed file.
Images to PDF
Convert JPG, PNG, or WebP images into a PDF — choose page size, reorder images, download.
SQL to JSON
Convert SQL INSERT statements to a JSON array — column names become object keys.
Number Base Converter
Convert numbers between decimal, binary, hexadecimal, and octal. Shows grouped binary output.
JSON to CSV Converter
Convert a JSON array of objects to CSV. Auto-detects columns, escapes fields per RFC 4180.
YAML to TOML Converter
Convert YAML configuration files to TOML format. Handles nested objects, arrays, and scalars.
Markdown to HTML
Convert Markdown to HTML with live preview. Uses the marked parser — same one used by GitHub.
Feet to Meters Converter
Convert feet to meters instantly with a quick-reference table.
Meters to Feet Converter
Convert meters to feet and inches with a reference table.
Liters to Gallons Converter
Convert liters to US and imperial gallons with a table.
Gallons to Liters Converter
Convert US or imperial gallons to liters with a table.
Grams to Ounces Converter
Convert grams to ounces with a quick-reference table.
XML to YAML Converter
Convert XML documents to clean, indented YAML output.
TOML to JSON Converter
Parse TOML configuration files and convert them to JSON.
Word to Number Converter
Convert written numbers like 'forty-two' to numerals.
Energy Converter
Convert between joules, calories, kilowatt-hours, BTU, and more.
Pressure Converter
Convert between pascal, bar, PSI, atm, torr, and mmHg.
Volume Converter
Convert between milliliters, liters, cups, pints, quarts, gallons, and more.
Angle Converter
Convert between degrees, radians, gradians, and turns.
Power Converter
Convert between watts, kilowatts, horsepower, BTU/h, and more.
Text to Hex Converter
Convert plain text to hexadecimal byte values.
Hex to Text Converter
Convert hexadecimal byte values back to readable plain text.
MM to Inches Converter
Convert millimeters to inches instantly with a reference table for common sizes.
Inches to MM Converter
Convert inches to millimeters with fractional inch support and a reference table.
mL to fl oz Converter
Convert milliliters to US fluid ounces with a quick-reference table for common volumes.
fl oz to mL Converter
Convert US fluid ounces to milliliters with a quick-reference table for common measures.
TOML to YAML Converter
Convert TOML configuration files to YAML format online — instant, no signup.
Miles to Km Converter
Convert miles to kilometers instantly with a quick-reference table for common distances.
Km to Miles Converter
Convert kilometers to miles instantly with a quick-reference table for common distances.
Celsius to Fahrenheit Converter
Convert Celsius to Fahrenheit using F = (C × 9/5) + 32 with a quick-reference temperature table.
Fahrenheit to Celsius Converter
Convert Fahrenheit to Celsius using C = (F − 32) × 5/9 with a quick-reference temperature table.
Pixels to Inches Converter
Convert pixels to inches at any DPI/PPI. Select screen resolution and see exact physical size for design and print.
MPG to L/100km Converter
Convert fuel economy from miles per gallon (US or UK) to litres per 100 kilometres and back. Includes a quick-reference comparison table.
L/100km to MPG Converter
Convert fuel economy from litres per 100 kilometres to miles per gallon (US or UK). Includes a quick-reference comparison table.
Bandwidth Converter
Convert between network speed units — bps, Kbps, Mbps, Gbps, Tbps — and toggle between bits and bytes. Includes common speed reference table.
JSON to HTML Table
Convert a JSON array of objects into a formatted HTML table. Paste your JSON and get clean, copy-ready HTML with sortable headers and optional styling.
IP to Decimal Converter
Convert an IPv4 address to its 32-bit decimal integer and back. See dotted-quad, decimal, hex, and binary side by side.
Decimal to IP Converter
Convert a 32-bit decimal integer back to an IPv4 dotted-quad address. Also shows hex and binary representations instantly.
Time to Seconds Converter
Convert HH:MM:SS time notation to total seconds, and seconds back to a human-readable duration. Handles hours, minutes, and seconds with instant results.
YAML to XML Converter
Convert YAML documents to well-formed XML. Handles nested objects, arrays, and all scalar types with configurable root element name and indentation.
HTML to HAML Converter
Convert HTML markup to HAML template syntax. Translates tags to HAML shorthand, handles attributes and classes, and removes verbose closing tags.
HTML to Pug Converter
Convert HTML to Pug (formerly Jade) template syntax. Translates tags, attributes, classes, and IDs into Pug's clean indentation-based format.
Hex to RGBA Converter
Convert hex color codes to rgba() with an adjustable alpha channel.
Degrees to Radians Converter
Convert between degrees and radians with π notation support.
Number to Excel Column Converter
Convert between Excel column numbers and letters (A=1, Z=26, AA=27).
Affine Cipher
Encode and decode text using the Affine cipher — choose coprime a and b keys with live alphabet mapping.
Rail Fence Cipher
Encode and decode text using the Rail Fence (zigzag) cipher — with visual rail diagram.
Color Temperature Converter
Convert Kelvin color temperature (1000–12000 K) to RGB and hex — from warm candlelight to cool daylight.
Properties to JSON Converter
Convert Java .properties files to JSON and back — handles comments, nested keys, and colon separators.
HTML Table to JSON
Convert HTML table markup to JSON or CSV — auto-detects headers, coerces types, and previews data.
JSON to TOML Converter
Convert JSON to TOML — nested objects become [tables], arrays of objects become [[arrays of tables]].
CSV to YAML Converter
Convert a CSV file to YAML — each row becomes a YAML mapping object in a sequence.
JSON to Dart Class
Generate a Dart class from JSON — with typed fields, fromJson factory, and toJson method.
Two's Complement Converter
Convert decimal integers to two's complement binary and back — supports 8, 16, 32, and 64-bit widths.
CSV to JSON
Convert CSV data to JSON array — auto-detect headers, handle quoted fields, and download the result.
JSON to Python Dict
Convert JSON to a Python dictionary literal — maps JSON types to Python None, True/False, and native dict/list syntax.
JSON to Kotlin Data Class
Generate a Kotlin data class from a JSON sample — typed properties, nullable inference, and nested class support.
JSON to Swift Struct
Generate a Swift struct with Codable conformance from a JSON sample — typed properties and CodingKeys when needed.
Properties to YAML
Convert Java .properties files to YAML — handles nested dot-notation keys, comments, and multiline values.
Encoders & Decoders
Safely encode, decode, and convert data formats without leakage.
Base64 Encoder
Encode or decode Base64 strings.
URL Encoder
Safely encode or decode URL parameters.
Base Converter
Convert numbers between binary, octal, decimal, hex, and base 2-36.
ROT13 Encoder / Decoder
Apply the reversible ROT13 letter-substitution cipher.
HTML Entity Encoder / Decoder
Escape or unescape HTML entities like & and <.
Punycode Converter
Convert internationalized domains to and from Punycode.
Text to Morse Code
Translate text into Morse code dots and dashes.
Morse Code to Text
Decode Morse code dots and dashes back into text.
UTF-8 Encoder
Encode text into UTF-8 byte values (hex).
UTF-8 Decoder
Decode UTF-8 byte values (hex) back into text.
Text to ASCII
Convert text into ASCII / Unicode code points.
ASCII to Text
Convert ASCII / Unicode code points back into text.
Base32 Encoder / Decoder
Encode or decode RFC 4648 Base32 strings.
Base58 Encoder / Decoder
Encode or decode Base58 (Bitcoin alphabet) strings.
Roman Numeral Converter
Convert numbers to Roman numerals and back.
Unicode Escape Converter
Escape text to \uXXXX sequences and unescape them back.
Base64URL Encoder / Decoder
Encode or decode URL-safe Base64 (Base64URL).
Backslash Escape Converter
Escape and unescape backslash sequences in strings.
JSON Escape / Unescape
Escape text into a JSON string literal or unescape \n, \t and \uXXXX back to readable text.
Caesar Cipher Encoder / Decoder
Shift letters by any amount to encode or decode a Caesar cipher.
Vigenère Cipher Encoder / Decoder
Encrypt or decrypt text with a keyword using the Vigenère cipher.
Base64 Image Encoder
Convert any image to a Base64 data URI — for CSS backgrounds, HTML src, and email embeds.
Base64 to Image
Paste a Base64 string or data URI to preview and download the decoded image.
Morse Code Converter
Encode text to Morse code and decode Morse code back to text. Includes a quick reference chart.
Binary Text Converter
Convert text to 8-bit binary and decode binary back to readable text. Instant, browser-side.
ROT47 Cipher
Encode or decode text using the ROT47 cipher (printable ASCII rotation).
Atbash Cipher
Encode and decode text with the Atbash cipher — a simple substitution cipher that maps A↔Z, B↔Y, and so on. Works for both encryption and decryption.
Polybius Square Cipher
Encode and decode text using the classic Polybius square — a 5×5 grid cipher that converts each letter to a pair of coordinates.
Base85 / ASCII85 Encoder
Encode and decode text using Base85 (ASCII85) — used in PDF and PostScript.
UUEncoder / UUDecoder
Encode and decode text using UUencoding — the classic Unix-to-Unix file format.
Cryptography & Security
Client-side hashing, token decoding, and secure generation.
Password Generator
Generate strong, random passwords locally.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes locally.
JWT Decoder
Decode JSON Web Tokens instantly and offline.
Bcrypt Generator
Generate and verify Bcrypt hashes with custom salt rounds.
MD5 Hash Generator
Generate an MD5 hash from any text.
SHA-1 Hash Generator
Generate a SHA-1 hash from any text.
SHA-256 Hash Generator
Generate a SHA-256 hash from any text.
SHA-512 Hash Generator
Generate a SHA-512 hash from any text.
HMAC Generator
Generate an HMAC signature with a secret key.
CRC32 Checksum Generator
Compute the CRC32 checksum of text.
SHA-384 Hash Generator
Generate a SHA-384 hash from any text.
JWT Encoder
Build and sign HS256 JSON Web Tokens with a secret.
Basic Auth Header Generator
Build an HTTP Basic Authorization header from credentials.
AES Encryption Tool
Encrypt and decrypt text with AES-GCM and a password.
Password Strength Checker
Estimate password strength, entropy, and crack time locally.
PBKDF2 Hash Generator
Derive a PBKDF2 key from a password and salt with SHA-256/384/512 — using the Web Crypto API.
htpasswd Generator
Generate an Apache/nginx .htpasswd line with a bcrypt-hashed password — entirely in your browser.
TOTP Generator
Generate time-based one-time passwords (TOTP / authenticator codes) from a Base32 secret — entirely in your browser.
File Hash Generator
Generate SHA-1, SHA-256, and SHA-512 hashes for any file. All processing runs in your browser.
Hash Identifier
Identify hash types by length and character set — detects MD5, SHA-1, SHA-256, bcrypt, RIPEMD, and 20+ more.
Generators
Generate identifiers, placeholder data, and assets on demand.
UUID Generator
Generate secure v4 UUIDs.
QR Code Generator
Create customizable QR codes and export as SVG or PNG.
Lorem Ipsum
Generate placeholder paragraphs, sentences, or word lists.
Random Hex Generator
Generate cryptographically random hexadecimal strings.
Random Number String
Generate a random string of digits of any length.
Random String Generator
Generate random strings from a custom character set.
Random Color Generator
Generate random colors as HEX, RGB, and HSL.
MAC Address Generator
Generate random MAC addresses in several formats.
Nano ID Generator
Generate compact, URL-safe Nano IDs.
Credit Card Number Generator
Generate valid test credit card numbers by brand.
ULID Generator
Generate sortable, time-based ULIDs.
Random IP Generator
Generate random IPv4 and IPv6 addresses.
SVG Placeholder Generator
Generate a lightweight SVG placeholder image (any size, colors, and label) as markup or a data URI.
Random Quote Generator
Get a random quote from programming, design, motivation, or philosophy. Click for a new one.
Fake Data Generator
Generate realistic test data — names, emails, addresses, jobs — in JSON or CSV format.
Lorem Ipsum Generator
Generate placeholder text — words, sentences, or paragraphs. Starts with the classic Lorem Ipsum.
HTML Boilerplate Generator
Generate a full HTML5 boilerplate with customizable options.
Random Number Generator
Generate random integers in any range — bulk generation with optional sort and unique mode.
Random Name Generator
Generate realistic random first and last names for testing, mockups, and prototypes.
Passphrase Generator
Generate strong, memorable passphrases from a built-in wordlist. Choose word count, separator, capitalisation, and append a number for extra entropy.
API Key Generator
Generate random API keys in multiple formats — hex, Base64, alphanumeric, UUID-style. Choose length and quantity. All generated locally in your browser.
Random Date Generator
Generate random dates between two dates in multiple formats for testing.
Random Email Generator
Generate random fake email addresses for testing and development.
CUID Generator
Generate collision-resistant unique IDs (CUID) — sortable, URL-safe alphanumeric strings.
Initials Avatar Generator
Generate an SVG avatar from name initials — choose shape, size, and color scheme.
README Badge Generator
Generate shields.io-compatible badges for GitHub READMEs — pick style, label, message, color, and copy Markdown or HTML.
Text Tools
Manipulate, clean, count, and reshape text instantly.
Case Converter
Convert between Sentence, Title, camelCase, snake_case, and more.
Word Counter
Count words, characters, and analyze keyword density.
Text to Binary
Convert text into its 8-bit binary representation.
Binary to Text
Decode 8-bit binary back into readable text.
Text Reverser
Reverse text by characters, words, or lines.
Remove Duplicate Lines
Delete repeated lines and keep your list unique.
Remove Empty Lines
Strip blank and whitespace-only lines from text.
Sort Lines Alphabetically
Sort lines A–Z or Z–A, case-sensitive or not.
Slugify URL Generator
Turn any title into a clean, URL-safe slug.
Find and Replace Text
Find and replace text, with optional regex and flags.
Remove Extra Spaces
Collapse repeated spaces and trim each line.
Remove Accents
Strip diacritics so é becomes e and ü becomes u.
Remove Punctuation
Delete punctuation marks and symbols from text.
Text Repeater
Repeat any text a chosen number of times.
Word Frequency Counter
Count how often each word appears, ranked.
Zalgo Text Generator
Add creepy combining marks to make glitchy Zalgo text.
Upside Down Text Generator
Flip text upside down with mirrored Unicode characters.
Small Text Generator
Make tiny superscript, subscript, and small-caps text.
Strikethrough Text Generator
Cross out text with strikethrough, slash, or underline marks.
Bold Text Generator
Generate Unicode bold and italic text for anywhere.
Wide Text Generator
Create full-width vaporwave aesthetic spaced-out text.
NATO Phonetic Alphabet
Spell text using the NATO phonetic alphabet.
Leetspeak Converter
Translate text into 1337 (leetspeak) and back.
Pig Latin Translator
Translate English text into Pig Latin.
Cursive Text Generator
Create fancy Unicode cursive (script) text.
Bubble Text Generator
Turn text into circled bubble letters.
Add Line Numbers
Prefix every line with a sequential line number.
Remove Line Breaks
Strip line breaks to join text into one block.
Remove HTML Tags
Strip HTML tags to extract plain text.
Extract Email Addresses
Pull every email address out of a block of text.
Extract URLs
Pull every URL or link out of a block of text.
Reverse Word Order
Reverse the order of words in each line of text.
Extract Numbers
Pull every number out of a block of text.
Remove Duplicate Words
Strip repeated words from text, keeping the first of each.
Word Wrap / Text Wrapper
Hard-wrap text to a fixed line width without breaking words.
Shuffle Lines
Randomly reorder the lines of your text.
Reverse List / Line Order
Flip the order of lines so the last becomes the first.
Lines to Comma-Separated List
Join lines into a single comma-separated list.
Comma-Separated to Lines
Split a comma-separated list into one item per line.
Remove Numbers
Strip every digit out of your text.
Text Truncator
Trim text to a set number of characters or words with an ellipsis.
Random Line Picker
Pick one or more random lines from your list.
Markdown to Plain Text
Strip Markdown formatting to get clean, readable plain text.
Tabs to Spaces Converter
Convert tabs to spaces or spaces to tabs with a custom tab width.
Palindrome Checker
Check whether a word, phrase, or sentence reads the same forwards and backwards.
Title Case Converter
Convert text to Title Case, capitalizing each major word while leaving small words like 'a', 'of', and 'the' lowercase.
Remove Line Numbers
Strip leading line numbers from pasted code or text — handles '1.', '1)', '1:' and bare-number styles.
Sponge Case Generator
Convert text to AlTeRnAtInG mOcKiNg CaSe — the classic SpongeBob meme format.
Letter Counter
Count the frequency of each letter in your text.
Anagram Checker
Check whether two words or phrases are anagrams of each other.
Prefix / Suffix Adder
Add a custom prefix and/or suffix to every line of text.
Duplicate Line Counter
Count how many times each line appears — sorted by frequency.
Image to ASCII Art
Convert any image to ASCII art — choose width and character density.
Text to Speech
Have your browser read text aloud using the Web Speech API — adjustable voice, speed, and pitch.
Word Scrambler
Scramble the middle letters of each word while keeping first and last letters intact.
Text Sorter
Sort lines alphabetically, by length, or reverse. Remove duplicates and empty lines in one click.
Text Replacer
Find and replace text with plain or regex patterns. Supports case-insensitive and replace-all modes.
Markdown TOC Generator
Generate a GitHub-style table of contents from Markdown headings. Anchors auto-derived from heading text.
HTML to Plain Text Converter
Convert HTML markup to clean, readable plain text.
ASCII Art Text Generator
Turn any text into ASCII art block letters and banners.
Number to Ordinal Converter
Convert numbers to ordinal form: 1st, 2nd, 3rd, and more.
Duplicate Line Remover
Remove duplicate lines from text, keeping only unique entries.
Character Frequency Analyzer
Count the frequency of each character or word in your text.
Superscript Text Generator
Convert text to Unicode superscript characters for use anywhere — no HTML needed.
Subscript Text Generator
Convert text to Unicode subscript characters for chemical formulas and math notation.
Braille Text Converter
Convert English text to Grade 1 Braille Unicode and back — bidirectional translation.
Slug Generator
Convert text to URL-friendly slugs — lowercase, hyphens, no special characters. Perfect for blog posts and URLs.
Whitespace Remover
Remove or normalize whitespace from text — trim edges, collapse multiple spaces, strip blank lines, or remove all whitespace.
Unicode Character Info
Look up any Unicode character or code point — name, block, category, HTML entity, CSS escape, UTF-8/16 bytes, and keyboard shortcut.
Sentence Case Converter
Convert text to sentence case — first letter of each sentence capitalised, rest in lowercase. Handles multiple paragraphs and preserves proper nouns option.
String Splitter
Split any string by a delimiter — comma, space, newline, or any custom separator. Optionally trim whitespace and filter empty parts. Export as lines or JSON array.
Text Padding Tool
Pad every line of text to a fixed width with any fill character. Left, right, and center alignment — useful for ASCII art, fixed-width output, and aligned code.
Remove Special Characters
Strip special characters, symbols, and punctuation from text with custom options.
Emoji Picker
Browse, search, and copy emoji by category. Click any emoji to copy it instantly.
Text Statistics
Detailed text analysis: words, sentences, paragraphs, avg lengths, syllables, Flesch score.
Character Map Explorer
Browse Unicode character blocks — code points, HTML entities, UTF-8 bytes, CSS escapes, and JS escapes.
Text to Emoji
Replace words in your text with relevant emojis — fun emoji substitution with 150+ word mappings.
Random Word Generator
Generate random English words by category — nouns, verbs, adjectives, or all mixed.
Phone Number Formatter
Format phone numbers to E.164, national, or international format — auto-detects country code.
Word Sorter
Sort words alphabetically, by length, or by frequency — ascending or descending, with optional duplicate removal.
Text to Unicode Codepoints
Convert text to Unicode code points (U+XXXX) and back — supports hex, decimal, and escape formats.
Developer Utilities
Network math, syntax parsers, and everyday developer helpers.
RegExp Tester
Test regular expressions and inspect matches locally.
Regex Visualizer
Visual regex pattern diagram with live match highlighting and capture group annotations.
Subnet Calculator
Compute CIDR subnets, usable hosts, and network ranges.
Cron Parser
Translate cron syntax into plain English.
URL Parser
Break a URL into protocol, host, path, and query parts.
HTML Previewer
Paste HTML and see it rendered live in a safe, sandboxed preview.
HTTP Status Code Reference
Search and look up every HTTP status code and its meaning.
MIME Type Lookup
Find the MIME type for a file extension, or the extensions for a MIME type.
ASCII Table
Full ASCII table with decimal, hex, octal, and binary values for every character.
Chmod Calculator
Build Unix file permissions with checkboxes and read them as octal (755) and symbolic (rwxr-xr-x) notation.
Crontab Generator
Build a cron expression from fields and read it back in plain English.
User Agent Parser
Parse a User-Agent string into browser, operating system, and device — in your browser.
Case Style Converter
Convert identifiers between camelCase, snake_case, kebab-case, PascalCase, CONSTANT_CASE, and dot.case.
JSON Diff Checker
Compare two JSON objects and see exactly what was added, removed, or changed — a structural diff, not a text diff.
Common Ports Lookup
Search a reference of common TCP/UDP port numbers and the services that use them — HTTP, SSH, DNS, and more.
Markdown Table Generator
Build a Markdown table in an editable grid — add rows and columns, set column alignment — and copy the Markdown.
.gitignore Generator
Generate a .gitignore file by selecting your tech stack.
EXIF Viewer
View EXIF metadata (camera model, GPS, date, settings) embedded in JPEG photos.
EXIF Remover
Strip all EXIF metadata from JPEG images to protect your privacy — processed locally.
JSON Tree Viewer
Visualize JSON as a collapsible, expandable tree. Color-coded types, click to expand.
JSON Schema Generator
Generate a JSON Schema (Draft 2020-12) from an example JSON object automatically.
cURL to Fetch
Convert cURL commands to JavaScript fetch() or axios calls — headers, body, and method.
IP Subnet Calculator
Calculate network address, broadcast, host range, and subnet mask for any IPv4 CIDR range.
JSONPath Tester
Test JSONPath expressions against JSON data. Supports dot notation, wildcards, slices, and recursive descent.
HTML Entities Reference
Searchable reference for 65+ HTML character entities. Copy named, numeric, or raw character formats.
UUID Validator
Validate a UUID, detect its version and variant, and decode v1 timestamps. Instant, private.
Byte Converter
Convert between bytes, KB, MB, GB, TB, KiB, MiB, and GiB.
HTTP Headers Lookup
Look up common HTTP headers: definitions, examples, and types.
.env File Parser
Parse and inspect .env files — view keys, values, and detect issues.
SemVer Comparator
Compare semantic version strings and check range compatibility.
Bitwise Calculator
Compute bitwise AND, OR, XOR, NOT, left/right shift on integers.
SQL SELECT Builder
Build SELECT queries visually — choose columns, WHERE, ORDER BY, and LIMIT.
JSON to Java Class
Generate Java POJO classes with constructors, getters, setters, and toString from JSON.
Regex Escape Tool
Escape special characters in a string for safe use in a regular expression pattern.
Locale Number Formatter
Format numbers using Intl.NumberFormat — compare locales, currencies, and units.
JSON to TypeScript
Generate TypeScript interfaces from any JSON object — handles nested objects, arrays, nullable types, and optional fields.
CSS Minifier
Minify CSS by removing comments, whitespace, and redundant characters. Shows byte savings. No upload needed.
HTML Minifier
Minify HTML by removing comments, extra whitespace, and blank lines. Shows byte savings. No upload needed.
HTTP Header Generator
Generate HTTP security headers — CSP, HSTS, X-Frame-Options, CORS, and more — with Nginx and Apache config snippets.
JSON to Zod Schema
Generate a Zod runtime validation schema from any JSON object. Handles nested objects, arrays, nullable values, and optional fields instantly.
ANSI Color Codes Reference
Complete reference for ANSI terminal escape codes — 16 standard colors, 256-color palette, RGB true color, and text styles. Click any entry to copy the escape sequence.
Nginx Config Generator
Generate Nginx server blocks for static sites, PHP-FPM, and Node.js reverse proxies.
Docker Compose Generator
Generate docker-compose.yml files with services, ports, volumes, and env vars.
Package.json Generator
Generate npm package.json files with name, version, scripts, and metadata.
SQL JOIN Visualizer
Visualize SQL join types with Venn diagrams, syntax examples, and result previews.
XPath Tester
Test XPath expressions against XML — evaluate nodes, strings, numbers, and booleans with presets.
PWA Manifest Generator
Generate a complete Web App Manifest JSON for Progressive Web Apps — all icons, display modes, and colors.
IP Range Expander
Expand a CIDR block into every individual IP address — with network info and CSV/JSON export.
Markdown Frontmatter Parser
Extract and display YAML frontmatter from Markdown files — see each field's type and JSON output.
HTTP Methods Reference
Complete reference for all 9 HTTP methods — safe, idempotent, cacheable properties and status codes.
JavaScript Minifier
Minify JavaScript by removing comments and whitespace — shrink JS files for production use.
GraphQL Formatter
Format and beautify GraphQL queries, mutations, and schemas with proper indentation.
CSS Class Extractor
Extract all unique CSS class names from HTML — sorted alphabetically or by frequency.
JSON Size Analyzer
Analyze a JSON document by byte size — find the heaviest keys and arrays ranked by size.
Regex Cheat Sheet
Complete regular expression reference — anchors, quantifiers, groups, lookaheads, and flags with examples.
SVG Optimizer
Optimize SVG code client-side — remove comments, whitespace, and redundant attributes to shrink file size.
Web & SEO
Generate meta tags, social cards, and marketing URLs for the web.
Meta Tag Generator
Build SEO title, description, and viewport meta tags.
Open Graph Generator
Generate Open Graph and Twitter Card meta tags.
Robots.txt Generator
Build a robots.txt file with per-bot rules. Block AI crawlers, set crawl delays, define sitemaps.
UTM Campaign URL Builder
Append UTM parameters to build trackable campaign URLs.
Hreflang Tag Generator
Generate hreflang link tags for multilingual SEO.
Sitemap XML Generator
Build an XML sitemap from a list of URLs.
SERP Snippet Preview
Preview how your page title and meta description appear in Google search.
Meta Tag Analyzer
Paste a page's HTML head to audit its title, meta, and social tags.
Keyword Density Checker
Count word frequency and keyword density in your content.
JSON-LD Schema Generator
Build structured data (Article, Product, FAQ, Organization) as JSON-LD.
Twitter Card Generator
Generate Twitter/X card meta tags with a live preview.
Open Graph Preview
Preview how a link's Open Graph card looks when shared on social.
Canonical Tag Generator
Generate a rel=canonical link tag to prevent duplicate content.
Twitter / X Character Counter
Count characters against the 280-limit as you draft a post.
Hashtag Generator
Turn keywords or text into ready-to-paste social hashtags.
Reading Time Calculator
Estimate reading and speaking time from your word count.
Readability Score Calculator
Score your text with Flesch Reading Ease and Flesch-Kincaid Grade Level to see how easy it is to read.
htaccess Redirect Generator
Generate Apache .htaccess 301 and 302 redirect rules from a list of old and new URLs.
SPF Record Builder
Build a valid SPF (Sender Policy Framework) DNS TXT record. Add IP ranges, include directives, and choose a policy. Explains each mechanism.
DMARC Record Builder
Build a valid DMARC DNS TXT record. Configure policy, subdomain policy, reporting URIs, and alignment modes. Explains every tag.
Robots Meta Tag Generator
Generate HTML meta robots tags and X-Robots-Tag headers with noindex, nofollow, and all crawler directives for Google, Bing, and social media bots.
HTTP Cookie Builder
Build Set-Cookie headers with all standard attributes — Path, Domain, Max-Age, Expires, Secure, HttpOnly, and SameSite. Preview and copy the full header string.
Content Security Policy Generator
Build a Content Security Policy header directive by directive. Configure script-src, style-src, img-src, connect-src, and more — then copy the header or meta tag.
HTML Mailto Link Generator
Build mailto: links with pre-filled subject, body, CC, and BCC fields. Preview the anchor tag, copy the full HTML, or copy just the mailto URI.
CORS Header Generator
Build CORS response headers for your API — configure origin, methods, headers, credentials.
Link Extractor
Extract all hyperlinks from HTML — see href, anchor text, and link type (absolute, relative, mailto).
UTM Link Builder
Build UTM-tagged URLs for Google Analytics campaigns — set source, medium, campaign, term, and content parameters.
Social Media Image Sizes
Reference guide for social media image dimensions — Facebook, Twitter, Instagram, LinkedIn, YouTube, and more.
Design & CSS
Client-side utilities for frontend styling and color.
Color Converter
Convert a color to HEX, RGB, HSL, HSB, and CMYK at once.
HEX to RGB
Convert HEX color codes to RGB / RGBA values.
RGB to HEX
Convert RGB values into HEX color codes.
CSS Box Shadow Generator
Visually design CSS box-shadow with a live preview and code.
CSS Border Radius Generator
Visually craft border-radius with a live preview.
HEX to CMYK
Convert HEX colors to CMYK print values.
CMYK to HEX
Convert CMYK print values to HEX colors.
HEX to HSB
Convert HEX colors to HSB / HSV values.
HSB to HEX
Convert HSB / HSV values to HEX colors.
Color Contrast Checker
Check WCAG contrast ratio between two colors.
RGB to HSL
Convert RGB values to HSL color notation.
HSL to RGB
Convert HSL color values back into RGB.
RGB to CMYK
Convert RGB screen colors to CMYK print values.
CMYK to RGB
Convert CMYK print values into RGB screen colors.
CSS Gradient Generator
Design linear and radial CSS gradients with live preview.
CSS Flexbox Generator
Visually build flexbox layouts and copy the CSS.
CSS Triangle Generator
Generate CSS triangles with the border trick.
CSS Clip Path Generator
Pick a clip-path shape and copy the CSS, with live preview.
CSS Text Shadow Generator
Design CSS text-shadow with a live preview and code.
Color Shades Generator
Generate tints and shades from a base color.
CSS Grid Generator
Build a CSS grid layout visually and copy the generated code.
CSS Filter Generator
Tune blur, brightness, contrast, and more with a live filter preview.
CSS Transition Generator
Build CSS transitions with easing and a live hover preview.
CSS Transform Generator
Translate, rotate, scale, and skew with a live transform preview.
CSS Scrollbar Generator
Style custom scrollbars and copy the cross-browser CSS.
CSS Columns Generator
Create multi-column text layouts with the CSS columns property.
CSS Cursor Tester
Preview every CSS cursor value and copy the one you want.
CSS Outline Generator
Design a CSS outline with style, width, color, and offset.
CSS Blend Mode Generator
Preview mix-blend-mode and background-blend-mode effects.
CSS Named Colors
Browse all 148 CSS named colors with their HEX and RGB values.
CSS Specificity Calculator
Calculate the specificity score of any CSS selector.
PX to REM Converter
Convert px to rem and em (and back) for any root font size.
Glassmorphism CSS Generator
Design frosted-glass cards with backdrop-blur and copy the CSS.
HEX to HSL
Convert a HEX color code to HSL (hue, saturation, lightness) for CSS, with a live preview.
HSL to HEX
Convert an HSL color (hue, saturation, lightness) to a HEX code for CSS, with a live preview.
Neumorphism CSS Generator
Design soft-UI neumorphic shadows and copy the CSS, with a live preview.
CSS Animation Generator
Build CSS @keyframes animations visually — property, duration, easing, and iteration — with a live preview and copy-paste code.
CSS Button Generator
Design a CSS button — colors, padding, radius, border, and hover state — with a live preview and ready-to-copy CSS.
CSS Loader Generator
Generate a pure-CSS loading spinner — size, color, and speed — with a live preview and copy-paste code (no images, no JS).
Color Mixer
Mix two HEX colors at any ratio and get the blended result, plus a gradient of in-between steps.
Color Palette Generator
Generate harmonious color palettes — complementary, analogous, triadic, and more.
RGB to HSB Converter
Convert RGB (red, green, blue) color values to HSB / HSV (hue, saturation, brightness).
HSB to RGB Converter
Convert HSB / HSV (hue, saturation, brightness) color values to RGB.
CSS Variables Generator
Generate a 10-shade CSS custom property scale from any base color.
Font Stack Generator
Browse and copy CSS font-family stacks for system fonts, serifs, monospace, and more.
CSS Unit Converter
Convert between px, rem, em, vw, vh, and pt instantly.
Image Compressor
Compress images with a quality slider and see the file-size savings. Files never leave your browser.
Image Resizer
Resize any image to exact pixel dimensions with optional aspect-ratio lock. No upload needed.
Image Cropper
Crop images to exact dimensions by setting pixel coordinates. Files never leave your browser.
Image Rotator & Flipper
Rotate images 90°/180°/270° and flip horizontally or vertically — in your browser.
Image to Grayscale
Convert any color image to black-and-white grayscale. Processed entirely in your browser.
Image Color Inverter
Invert the colors of any image to create a negative effect — no upload needed.
Image Brightness & Contrast
Adjust brightness, contrast, and saturation of any image with live sliders.
Favicon Generator
Generate favicon PNG files at standard sizes (16, 32, 48, 64, 128, 192 px) from any image.
Image Color Picker
Upload an image and click any pixel to pick its exact HEX, RGB, and HSL color values.
Image Watermark
Add a custom text watermark to any image with position, opacity, and font-size control.
Image Pixelator
Apply a pixel-art / mosaic blur effect to any image with a block-size slider.
CSS to Tailwind
Convert CSS properties to equivalent Tailwind CSS utility classes with one click.
Color Blindness Simulator
See how your image appears to people with protanopia, deuteranopia, tritanopia, or achromatopsia.
CSS Variable Extractor
Paste CSS to extract all custom properties (--variables), their values, and selectors. Filter and copy instantly.
Color Name Converter
Find the nearest CSS named color for any hex or RGB value. All 148 CSS named colors included.
CSS Media Query Generator
Generate CSS media queries for common responsive breakpoints.
CSS Clamp Calculator
Generate CSS clamp() values for fluid, responsive typography and spacing.
Tailwind Color Palette
Browse all Tailwind CSS v3 colors with hex values — click to copy hex or class name.
CSS Neon Glow Generator
Generate CSS neon glow effects for text or boxes — live preview, copy-ready CSS.
CSS Text Gradient Generator
Generate CSS gradient text with live preview — copy CSS or Tailwind snippet instantly.
Color to CSS Filter
Convert a hex color to a CSS filter string to tint SVGs and images. Approximate any color with CSS filter properties.
Gradient Border Generator
Generate CSS gradient borders with live preview. Customize colors, angle, border width, and radius — copy ready-to-use CSS.
CSS Background Pattern Generator
Generate pure-CSS background patterns — dots, stripes, checkerboard, grid, diagonal, zigzag — with live preview and copy-ready CSS.
CSS Backdrop Filter Generator
Generate CSS backdrop-filter properties — blur, brightness, contrast, saturate, and more — with a live frosted-glass preview. Copy ready-to-use CSS.
Typography Scale Generator
Generate a harmonious typographic scale — choose a base size and ratio, preview all heading levels, and copy CSS custom properties or Tailwind config.
CSS Reset Generator
Generate CSS reset snippets — choose from Eric Meyer reset, normalize.css approach, minimal browser-default overrides, or a custom combination. Copy-ready.
SVG Wave Generator
Generate customizable SVG wave dividers — sine, triangle, and step waves for website section transitions.
Font Size Calculator
Convert between px, rem, em, pt, vw, vh, and % font sizes — with configurable root and context sizes.
Tailwind to CSS Converter
Convert Tailwind utility classes to equivalent CSS — spacing, typography, flexbox, borders, shadows, colors.
Color Palette from Image
Upload any image and extract the dominant color palette — up to 16 hex, RGB, and HSL swatches.
CSS Mask Generator
Generate CSS mask-image values with gradient and SVG presets — create fade and reveal effects.
Drop Shadow Filter Generator
Generate CSS filter: drop-shadow() values with live preview — works on PNG transparency unlike box-shadow.
CSS Tooltip Generator
Generate pure CSS tooltips — pick position, colors, arrow size, and border radius with a live preview.
CSS Skeleton Loader Generator
Generate CSS skeleton loading animations — configure shape, colors, speed, and copy the shimmer keyframe code.
Calculators
Fast, precise calculators for everyday math and dates.
Percentage Calculator
Solve percentage, increase, and change calculations.
Age Calculator
Calculate exact age in years, months, and days.
Unix Timestamp Converter
Convert Unix epoch timestamps to and from human dates.
Tip Calculator
Calculate tip and split the bill between people.
Aspect Ratio Calculator
Solve width or height for a target aspect ratio.
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin.
Data Storage Converter
Convert between bytes, KB, MB, GB, TB, and more.
Discount Calculator
Calculate sale price and savings from a discount.
Profit Margin Calculator
Compute profit, margin, and markup from cost and revenue.
BMI Calculator
Calculate Body Mass Index in metric or imperial units.
Loan EMI Calculator
Calculate monthly loan payments, interest, and total cost.
Average (Mean/Median/Mode) Calculator
Compute the mean, median, mode, and range of a number set.
Percentage Change Calculator
Find the percentage increase or decrease between two values.
Compound Interest Calculator
Project savings growth with compound interest and contributions.
Simple Interest Calculator
Calculate simple interest and total from principal and rate.
Time Duration Calculator
Find the duration between two times or dates.
GST / VAT Calculator
Add or remove GST/VAT and see the net, tax, and gross amounts.
Running Pace Calculator
Calculate pace, time, or distance for runs and races.
ROI Calculator
Calculate return on investment as a percentage and net gain.
Break-Even Point Calculator
Find the units and revenue needed to cover your costs.
Speed Converter
Convert between mph, km/h, m/s, knots, and feet per second.
Area Converter
Convert between m², ft², acres, hectares, and more.
Hourly to Salary Calculator
Convert an hourly wage to weekly, monthly, and annual pay.
GCD & LCM Calculator
Find the greatest common divisor and least common multiple of numbers.
Prime Number Checker
Check whether a number is prime and see its factors.
GPA Calculator
Calculate your grade point average on a 4.0 scale from letter grades and credit hours.
Business Days Calculator
Count the working days (Mon–Fri) between two dates, excluding weekends.
PayPal Fee Calculator
Work out PayPal fees and what you actually receive — or what to charge to net a target amount.
BMR Calculator
Estimate your Basal Metabolic Rate and daily calorie needs with the Mifflin-St Jeor formula.
CPM Calculator
Calculate CPM (cost per 1,000 impressions), or solve for cost or impressions.
Mortgage Calculator
Estimate your monthly mortgage payment — principal, interest, property tax, insurance, and PMI — and see the total interest paid.
TDEE Calculator
Calculate your Total Daily Energy Expenditure (maintenance calories) plus goal targets for cutting, maintaining, or bulking.
Body Fat Calculator
Estimate your body fat percentage with the U.S. Navy tape-measurement method, plus lean and fat mass.
Stripe Fee Calculator
Work out Stripe processing fees (2.9% + 30¢) and what you actually receive — or what to charge to net a target amount.
Fibonacci Sequence Generator
Generate any number of Fibonacci terms — including very large ones, using BigInt.
Number Formatter
Format numbers with custom thousand separators, decimal places, and prefix / suffix.
Calories Burned Calculator
Estimate calories burned during exercise using MET values — choose activity, weight, and duration.
Fuel Cost Calculator
Calculate trip fuel costs based on distance, fuel efficiency, and price per litre or gallon.
Electricity Cost Calculator
Calculate the running cost of any appliance — enter watts, hours per day, and your kWh rate.
Net Salary Calculator
Calculate take-home pay after income tax, social contributions, and other deductions.
Date Difference Calculator
Calculate the difference between two dates in years, months, days, weeks, and hours instantly.
Scientific Calculator
Full scientific calculator with trig, logarithms, powers, square root, memory. DEG/RAD toggle.
Sleep Cycle Calculator
Find optimal wake times or bedtimes based on 90-min sleep cycles.
Unit Price Calculator
Compare two products by price per unit to find the best deal.
Water Intake Calculator
Calculate your daily water intake by weight and activity level.
Retirement Savings Calculator
Project your retirement balance with contributions and return rate.
Date Add/Subtract Calculator
Add or subtract days, weeks, months, or years from any date.
Percentage Of Calculator
Calculate percentage of a number, percentage change, and reverse percentage.
Proportion Calculator
Solve proportions and ratios — find the missing value in A/B = C/D.
Standard Deviation Calculator
Calculate mean, variance, and standard deviation for a data set.
Prime Factorization Calculator
Find the prime factors of any integer using trial division.
Days Until Date
Count the exact number of days until any future date.
Inflation Calculator
Calculate the inflation-adjusted value of money between any two years.
Typing Speed Calculator
Calculate your typing speed in WPM and CPM — paste text and enter your time.
Grade Calculator
Calculate weighted grade averages, letter grades, and GPA from assignment scores.
Savings Goal Calculator
Find out how long it takes to reach a savings goal with monthly contributions and interest.
Time Zone Converter
Convert date and time between any two IANA time zones. No network required — all calculations run locally in your browser.
Frequency Converter
Convert between Hz, kHz, MHz, GHz, and THz instantly. Covers radio, audio, WiFi, and optical frequencies.
Square Footage Calculator
Calculate the area of any space in square feet and square meters. Supports rectangles, circles, and triangles.
CAGR Calculator
Calculate Compound Annual Growth Rate from start value, end value, and years. Also works backwards to find start/end value or number of years.
Present Value Calculator
Calculate the present value of a future cash flow using a discount rate and number of periods. Essential for investment and finance decisions.
Future Value Calculator
Calculate the future value of a lump sum or regular contributions at a given interest rate and time period. Includes compound and simple interest modes.
Loan Amortization Calculator
Generate a full loan amortization schedule — monthly principal, interest, and balance for every payment. Download as CSV.
Quadratic Equation Solver
Solve ax² + bx + c = 0 instantly. Shows discriminant, real and complex roots, vertex, and axis of symmetry with step-by-step working.
Fraction Calculator
Add, subtract, multiply, and divide fractions with step-by-step solutions. Automatically simplifies results using the greatest common divisor.
Number Sequence Generator
Generate arithmetic or geometric number sequences. Set the first term, common difference or ratio, and how many terms to produce — up to 200 terms.
Triangle Calculator
Solve any triangle given sides and angles (SSS, SAS, AAS, ASA). Calculates all missing sides, angles, area, perimeter, and height using the law of sines and cosines.
Circle Calculator
Calculate any circle property from any other — radius, diameter, circumference, and area. Enter one value to instantly see all four with the formula used.
Download Time Calculator
Calculate how long a download will take given file size and connection speed.
Ohm's Law Calculator
Calculate voltage, current, resistance, or power using Ohm's Law (V=IR).
Resistor Color Code Calculator
Decode 4-band and 5-band resistor color codes to resistance values.
Tax Bracket Calculator
Calculate US federal income tax by bracket for 2024 and 2025 tax years.
Pomodoro Timer
25/5 Pomodoro productivity timer with session tracking and long break every 4 rounds.
Matrix Calculator
Add, subtract, multiply, transpose, and invert 2×2 or 3×3 matrices — with determinant calculation.
Dice Probability Calculator
Calculate exact probability distributions for any dice roll — full chart for d4, d6, d8, d10, d12, d20.
Lotto Number Generator
Generate random lottery numbers for Powerball, EuroMillions, UK Lotto, or a custom pool and pick.
Number Divisibility Checker
Check divisibility by any set of divisors — prime factorization, GCD, LCM, and digit sum included.
Pythagorean Theorem Calculator
Solve the Pythagorean theorem — given any two sides, calculate the third with angles and area.
Speed Distance Time Calculator
Calculate speed, distance, or time — enter any two values to find the third with unit conversion.
Calorie Macro Calculator
Calculate calories from macronutrients — protein, carbohydrates, fat, and alcohol in grams.
Percentage Error Calculator
Calculate percentage error between experimental and theoretical values — absolute and relative error.
Z-Score Calculator
Calculate the z-score, p-value, and percentile for a data point given a mean and standard deviation.
Wind Chill Calculator
Calculate wind chill and heat index — how temperature feels given wind speed or humidity, in °C or °F.
Pixel Density Calculator
Calculate pixels per inch (PPI) and dots per inch (DPI) for any screen — enter resolution and diagonal size.
Bitrate Calculator
Calculate video or audio bitrate and estimate file size — enter resolution, FPS, codec, and duration.