No More VLOOKUP ✓ 100% in-browser
COMPARE TOOL

Compare

Colour-coded diff between two spreadsheet versions

Upload an old and a new version of a spreadsheet. Match rows on one or more key columns with exact, partial or fuzzy matching. Added, removed and changed cells are highlighted — download the full diff as CSV.

Open Compare Tool →

How to Use — Step by Step

1
Upload Old file
The baseline / earlier version to compare against.
2
Upload New file
The updated version.
3
Add key pairs
Map a column from each file to link matching rows.
4
Choose match mode
Exact · Partial (substring) · Fuzzy (Levenshtein).
5
Run comparison
Each row is labelled Unchanged / Modified / Added / Removed.
6
Filter → Download
Isolate Added/Removed/Modified rows, then export the diff CSV.

Features

3 match modes
Exact, Partial, Fuzzy.
Multi-column keys
Composite key support.
Cell-level diff
Old value struck-through red, new value green.
Match score
Fuzzy match confidence shown as a percentage.
Status filter
Show only Added / Removed / Modified rows.
100% in-browser
Your data never leaves your device.

Export

Download format: Output: CSV with __status (and __score in fuzzy mode) columns.

Privacy & Security

Your files never leave your device. All processing happens entirely inside your browser tab using JavaScript. No data is uploaded to any server, no account is required, and nothing is stored after you close the tab. Fully GDPR-friendly — no data processing obligations are created by using this tool.