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Compare CSV Files

Free tool to compare two CSV files and highlight the differences (rows only in one file vs common), in your browser.

Learn more: CSV Files ExplainedThe CSV format, RFC 4180 quoting rules, encodings, common pitfalls, and how CSV compares to TSV, JSON and Parquet.

CSV ACSV B

Result

Runs entirely in your browser — nothing you enter is uploaded or stored.

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Compare CSV Files

Free tool to compare two CSV files and highlight the differences (rows only in one file vs common), in your browser.

All processing happens in your browser — your files never leave the page, which you can confirm from the Network panel or our privacy policy.

Frequently asked questions

How do I use the Compare CSV Files?

Paste your two CSV files (A and B) and the result appears below. Everything runs in your browser.

Is my data uploaded anywhere?

No. This tool runs entirely in your browser — your CSV files are never sent to a server.

Is the Compare CSV Files free?

Yes — completely free, no sign-up and no limits.

Compare CSV Files

Frequently asked questions

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