Compare two CSV, TSV, or XLSX worksheets locally by row key or position. Find added and removed rows, changed values, formula differences, duplicate keys, and unmatched columns without uploading either file.
Drop a CSV, TSV, or XLSX file
Drop a CSV, TSV, or XLSX file
The original file, updated file, selected keys, comparison result, and exports remain in your browser. File contents and names are excluded from analytics.
1
Choose a worksheet from the earlier file and the corresponding worksheet from the later file.
2
Use stable ID columns when available, or use positional comparison for files with identical row order.
3
Inspect added and removed rows, changed values, formula changes, and mapping issues, then export the evidence.