Writing Room · Bench
Diff Checker
Compare two texts and see the differences
Original
Changed
Differences
Line-by-line comparison. Everything runs in your browser — nothing is uploaded.
About this bench
About Diff Checker
Compare two blocks of text and instantly see what was added, removed or changed, highlighted line by line. Perfect for reviewing edits, contracts, code or documents.
Input
Type or paste the text you want to inspect or transform; nothing is sent for remote processing.
Result
An immediate text result that can be reviewed and copied from the browser.
Limits
Meaning, tone and language-dependent results are mechanical aids. Review important writing before publishing or relying on it.
How to use Diff Checker
- 01Paste the original text on the left and the changed text on the right.
- 02The differences are highlighted automatically — additions and deletions in colour.
- 03Scroll through to review every change.
- 04Edit either side and the comparison updates live.
Frequently asked questions
Is the text I compare private?
Nothing is uploaded. This tool runs entirely in your browser, so your data is processed on your own device and never sent to a server.
Is the diff checker free?
Yes — it is free with no sign-up, no watermark and no account-based quota. Your browser, device memory and the bench's stated file limits still determine how much it can process at once.
How are text changes displayed?
The comparison highlights added and removed lines so you can review differences between the original and changed text.