Upload two Excel or CSV files and get a colour-coded diff highlighting every changed, added, and removed cell. Pro tier.
Free is enough for most one-off jobs. Pro raises the file and batch caps; Pro + Media unlocks GB-scale streaming and unlimited duration.
Larger files supported on Developer (5 GB CSV) and Enterprise (unlimited). All processing happens in your browser — files never reach a server.
Upload the original and revised Excel or CSV files
Cell-by-cell comparison is performed using the diff algorithm
Download a colour-coded Excel file showing additions (green), deletions (red), and changes (amber)
0 bytes uploaded. Range Comparison (Diff) runs entirely in your browser using SheetJS and ExcelJS. Your spreadsheets never leave your device.
Sheets with matching names are compared automatically. Sheets present in only one file are flagged as added or removed.
The diff algorithm aligns rows by content similarity before comparing cells, so an inserted row doesn't shift all subsequent rows into the 'changed' category.