Compare Two Excel Files
Upload two versions of a file and a key column, and get a report of exactly what was added, removed, or changed.
Privacy & processing: Runs entirely in your browser — your file is never uploaded to a server.
How to use this tool
- Upload the original and updated files
- Choose the column that uniquely identifies a row
- Review the added / removed / changed counts
- Download the difference report
Common use cases
- Auditing changes between two versions of a report
- Reconciling exports taken at different times
- Reviewing what changed after a bulk edit
Limitations
The comparison is only as reliable as the key column you choose — picking a column that isn't actually unique per row will produce misleading matches.
FAQ
How does it decide which rows match between the two files?
You choose a key column (or combination of columns); rows are matched between files based on that key, not on row position.
What if a row's key exists in only one file?
It's reported as added (if only in the newer file) or removed (if only in the older file).
Does this modify either of my original files?
No — it produces a separate comparison result; both original files stay untouched.