CSV Diff
Compare two CSVs row by row, cell by cell - see exactly what changed, was added, or removed.
Upload two versions of a CSV file and see added rows, removed rows, and changed cells highlighted side by side. Useful for tracking changes between two exports of the same dataset - a product catalog after a supplier update, or a contact list between two CRM syncs - without manually scanning thousands of rows. Comparison runs entirely client-side, so neither file is uploaded to a server.
Loading tool
Details
- Category
- Developer & data
- Formats
- CSV
- Runs
- In your browser
- Files uploaded
- No
- Cost per run
- Free
- Sign-in
- Not required
- Works offline
- Yes, once loaded
Last updated 2026-08-03
Common questions
How are rows matched between the two files?
Rows are compared by position or by a key column, so reordered rows with identical content can still be matched correctly depending on the mode used.
What's shown for a changed row?
Each changed cell is highlighted individually, so you can see exactly which fields differ rather than just that the row changed.
Are my CSV files uploaded?
No - the comparison runs entirely in your browser.
Can I export the diff results?
The comparison view highlights differences on screen for review and copying.