Text Compare (Diff Checker)
Paste two versions and see exactly what changed.
Runs 100% in your browser. Your files are not uploaded to any server.
How to use Text Compare (Diff Checker)
- Paste the original text on the left and the changed text on the right.
- Choose to compare by lines, words or characters.
- Added parts are green, removed parts are red with a strike-through.
Frequently asked questions
Which comparison mode should I use?
Lines is best for code and lists, Words for prose and contracts, and Characters to spot tiny typos.
Is it safe for confidential documents?
Yes. The comparison runs entirely in your browser; your text is never uploaded or stored.
Is Text Compare (Diff Checker) free?
Yes. Text Compare (Diff Checker) is free to use with no sign-up and no watermark.
Are my files uploaded to your server?
No. All processing happens locally in your browser using JavaScript and WebAssembly. Your files never leave your device, which also makes it fast and private.
Does it work on my phone?
Yes. It works in any modern browser on Windows, Mac, Linux, Android and iPhone. Very large files may be slow on older phones.