CSV Diff Checker
Free csv diff checker — compare two inputs and highlight added and removed lines, entirely in your browser.
Runs entirely in your browser — nothing you enter is uploaded or stored.
CSV Diff Checker
Free csv diff checker — compare two inputs and highlight added and removed lines, entirely in your browser.
Both inputs are compared entirely in your browser — nothing is uploaded, which you can confirm from the Network panel or our privacy policy.
Frequently asked questions
How does the CSV Diff Checker work?
Paste your two inputs (A and B). Each is normalised, then compared line by line — added lines are green, removed lines are red. Everything runs in your browser.
Does it understand the format?
Yes — structured inputs (JSON, YAML, TOML, CSV) are parsed and re-serialised first, so differences in key order or formatting are ignored and only real changes show.
Is my data uploaded?
No. Both inputs are compared locally in your browser and never sent to a server.