Diff Checker
Compare texts side-by-side and spot the differences in seconds.
Comparison Result
Spot the Difference Instantly
Comparing code or text versions manually is painful and error-prone. Our Diff Checker highlights every addition in Green and deletion in Red so you never miss a change.
Code Review
Perfect for checking what changed in a config file or minified script before deploying.
Text Comparison
Compare drafts of essays, contracts, or terms of service to track revisions.
Privacy First
Your data never leaves your browser. Safe for sensitive tokens and keys.
How It Works
The Diff Checker runs entirely in your browser using JavaScript. Unlike other tools that send your data to a server, we process everything locally on your device. This guarantees 100% privacy and blazing fast speed.
- No server interaction – data never leaves your device
- Instant results since there is no network latency
- Works offline once the page is loaded
- Free to use with no usage limits
How to Use
Original Text
Paste the original version of your text or code on the left.
Modified Text
Paste the new version on the right.
View Diff
See highlighted differences below: Red for deletions, Green for additions.
Frequently Asked Questions
Is it line-by-line?
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The Diff Checker is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.