CSV Compare

Compare two CSV tables using a unique key column. Identify added, removed and changed records in a readable differences report.

Open the interactive workspace with JavaScript enabled. Preview and editing are free.

How to use CSV Compare

1. Load the before and after CSV tables.
2. Read columns and choose the unique key.
3. Review changes and export the report.

Output and supported files

CSV differences report. Both files need the same column names and unique non-empty keys. Values are compared exactly, with no automatic matching or guessing.

Do my files leave my device?

Your file contents stay in your browser. Account, credits and tool-usage requests reach Oxodian.

Related tools

Files are processed on your device. Sign in for five daily free credits; one export or started session costs one credit. Unused daily credits do not roll over. Device and file limits apply.