CSV Validator
Validate CSV structure — RFC-4180 quoted multi-line fields, delimiter auto-detect (,/;/tab/|), column counts, types, headers, and empty cells.
CSV Validator
This validator parses CSV text or files directly in your browser — nothing is uploaded to a server. It uses a proper RFC 4180 state-machine parser, so quoted fields that contain commas, quotes, or line breaks ("line1\nline2") are handled correctly instead of being mis-split into extra rows. It auto-detects the delimiter (comma, semicolon, tab, or pipe) and lets you override it, then checks for inconsistent column counts, duplicate headers, always-empty columns, and type inconsistencies (e.g. a mostly-numeric column with a stray text value). The per-column table shows inferred type, percentage of empty cells, and unique value count for quick data-quality review.
Private & free — this tool runs entirely in your browser.