CSV diff
Compare two files cell by cell. Rows line up by position, columns by heading. For unsaved edits in a huge sheet, use the Mac app.
Left file
Right file
Other tools
CSV to JSON
Turn a CSV file into formatted JSON objects. Runs in your browser.
CSV to Markdown
Convert selected rows into a Markdown table you can paste into docs.
CSV to SQL
Generate SQL INSERT statements from a CSV file, without uploading it.
CSV validator
Check for unbalanced quotes, ragged rows, and blank or duplicate headings.
Nothing is uploaded. About 15 MB per file.Privacy
When the Mac app is the better tool
The Mac app compares your unsaved edits with the last save, or shows two files side by side. This tab compares two small files row by row.
Common questions
Are the two files uploaded?
No. Both stay in the browser.
Is this a join on an ID column?
No. Rows line up by position, columns by heading. Sort both files the same way first if order drifted.
See what you changed
CSVUtility compares unsaved edits with the last save, with both sides scrolling together.
Download for MacOS