Compare Excel Files
Find every change between two spreadsheets — added rows, removed rows, modified cells. 100% private. Your files never leave your browser.
Original file
Drag & drop or browse
XLSX, XLS, CSV
New version
Drag & drop or browse
XLSX, XLS, CSV
No files?
How to compare two Excel files
- Drop both workbooks
Load your "before" file on the left and "after" file on the right. .xlsx, .xls, and .csv all work.
- Review the diff instantly
Added rows are highlighted green, removed rows red, modified cells yellow. Search, filter by change type, and jump between changes with the navigate bar.
- Export the result
Download an annotated .xlsx, a PDF, or an HTML report — or use Reconcile mode to produce a merged output file.
Frequently asked questions
- How do I compare two Excel files?
- Drop both files above — original on the left, new version on the right. SheetToolkit instantly highlights every added row (green), removed row (red), and modified cell (yellow). Nothing is uploaded; all processing happens in your browser.
- Can I compare Excel files with different column orders or renamed columns?
- Yes. SheetToolkit aligns columns by header name, not by position. If a column was renamed between versions, map it under Advanced → Column mapping so the values are compared correctly.
- Can I compare Excel workbooks with multiple sheets?
- Yes. SheetToolkit matches sheets by name and shows a separate diff per sheet. The free tier compares the first sheet; multi-sheet comparison is unlocked with SheetToolkit Pro.
- What kinds of changes does the Excel diff detect?
- Added rows, removed rows, and modified cells — each highlighted by colour. You can filter by change type, search by value, jump between changes, and export an annotated .xlsx, PDF, or HTML report.
- Is my Excel data private?
- Completely. Files are read and compared in your browser using JavaScript. Nothing is ever sent to a server — you can disconnect from the internet after the page loads and the tool still works.