MIME Type Lookup

Find the MIME type for a file extension, or the extensions for a MIME type.

Extension	MIME type
.txt	text/plain
.html	text/html
.css	text/css
.csv	text/csv
.md	text/markdown
.ics	text/calendar
.js	text/javascript
.mjs	text/javascript
.json	application/json
.xml	application/xml
.yaml	application/yaml
.yml	application/yaml
.wasm	application/wasm
.pdf	application/pdf
.rtf	application/rtf
.zip	application/zip
.gz	application/gzip
.tar	application/x-tar
.7z	application/x-7z-compressed
.rar	application/vnd.rar
.bin	application/octet-stream
.doc	application/msword
.docx	application/vnd.openxmlformats-officedocument.wordprocessingml.document
.xls	application/vnd.ms-excel
.xlsx	application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
.ppt	application/vnd.ms-powerpoint
.pptx	application/vnd.openxmlformats-officedocument.presentationml.presentation
.png	image/png
.jpg	image/jpeg
.jpeg	image/jpeg
.gif	image/gif
.svg	image/svg+xml
.webp	image/webp
.avif	image/avif
.apng	image/apng
.bmp	image/bmp
.ico	image/vnd.microsoft.icon
.tiff	image/tiff
.mp3	audio/mpeg
.wav	audio/wav
.ogg	audio/ogg
.aac	audio/aac
.weba	audio/webm
.mp4	video/mp4
.webm	video/webm
.mpeg	video/mpeg
.mov	video/quicktime
.avi	video/x-msvideo
.woff	font/woff
.woff2	font/woff2
.ttf	font/ttf
.otf	font/otf
.eot	application/vnd.ms-fontobject

What is a MIME type?

A MIME type (also called a media type or content type) tells browsers and servers what kind of data a file contains, such as text/html or image/svg+xml. It is sent in the Content-Type response header and decides how the content is handled — rendered, downloaded, or executed. Getting it right matters for security and for features like inline previews and font loading.

Setting response headers? Pair this with the HTTP status code reference. Encoding a file inline? The SVG to data URI and Base64 tools include the right MIME type for you.

Built and maintained by Meet Shah · Last updated 1 August 2026

What this tool is used for

Finding the correct MIME type for a file extension.
Finding which extensions a MIME type covers.
Checking a type before setting a content-type header.
Confirming the type a server should send for an asset.
Resolving a download that opens in the browser instead of saving.

Frequently Asked Questions

What is a MIME type for?: It tells the recipient how to interpret bytes. Browsers act on the Content-Type header, not the file extension, so serving a stylesheet as text/plain means it is downloaded or ignored rather than applied.
Why is JavaScript listed as text/javascript?: Because that is what the current specification requires. application/javascript and application/x-javascript are both obsolete though still widely accepted; the HTML standard designates text/javascript as the one to use.
Do I need charset on a text type?: Yes for anything textual. Without ; charset=utf-8 the browser falls back to a default that may not be UTF-8, which is how correct source files end up rendering as mojibake. It is unnecessary for binary types.
Why are Office types so long?: They are vendor-registered types under the vnd. tree, and the OOXML names encode the whole format lineage. The legacy binary formats are much shorter — application/msword for .doc against the full openxmlformats string for .docx.
What does application/octet-stream mean?: "Unknown bytes." It is the correct fallback when the type genuinely is not known, and it usually triggers a download prompt. Using it as a lazy default for a known type defeats caching and inline display.
Can one extension have several types?: Yes, and the reverse too. .ogg may be audio or video, and both .jpg and .jpeg are image/jpeg. Where a mapping is ambiguous the server's configuration decides, which is why explicit types blocks are worth setting.

Common errors and gotchas

Trusting a client-supplied type, which is trivially forged and must never gate an upload.
Using a non-standard type where a registered one exists, which some clients reject.
Omitting the charset on a text type, which leaves the encoding to a guess.
Assuming the extension determines the type, when the bytes are what actually matter.
Serving a JavaScript module with the wrong type, which browsers refuse to execute.