Add two files and choose what identifies a row.
Spreadsheet Compare
Compare two CSV or Excel files by the key columns you choose. Get added and removed rows, changed cells and duplicate keys, and export the differences as CSV.
Good to know
- Rows are matched by key, not position, so a re-sorted file does not show as changed.
- Duplicate keys are flagged, because they cannot be matched with confidence.
- Values are compared as displayed text, so 1.0 and 1 count as different.
Your files stay on your machine
This tool runs entirely inside your browser tab. Nothing is uploaded, stored, or sent to a server — close the tab and every trace is gone.
These are the free ones — see the full suiteHow big a file can it take?
There is no upload, so there is no upload limit — but the work happens in this tab, which means your browser’s memory is the budget. Nothing here will refuse a file for being large; a big enough one simply gets slow and, eventually, reloads the tab. The figures below are rules of thumb on a desktop browser, not enforced caps. On a phone or tablet, expect a good deal less.
- Each file is read to at most 50,000 rows, and the result says when rows were left out.
- Wide sheets cost more than long ones, because every cell is held as text.
Password-protected PDFs are declined whatever their size — unlock the file first. If a run does die on a long document, splitting it into volumes and working through them one at a time is the reliable way round it.