Match rows by key
Choose a unique ID, use a composite key, or compare complete rows when no stable identifier exists.
Local CSV processing
Compare CSV Files
Upload or paste two CSV files to inspect inserts, deletes, and cell-level updates in your browser.
Compare CSV files without uploading them
CSV Diff is a browser-based CSV difference checker for finding added, removed, and modified rows between two files. Parsing and comparison happen on your device, so your CSV data is not sent to our servers.
Find meaningful changes
Filter additions, removals, and cell-level modifications, search the results, and export the detected differences.
Handle real-world CSV formats
Compare comma, semicolon, tab, or pipe-delimited files with quoted fields, embedded line breaks, common BOMs, and multiple text encodings.