Free Online Tool
Text Diff Checker
Compare two texts line by line and see every addition and deletion highlighted.
The Text Diff Checker lets you compare two texts line by line and see every addition and deletion highlighted. Paste both versions below and the comparison updates instantly — nothing you paste is ever uploaded.
How to use the Text Diff Checker
- Paste your original text into the first box.
- Paste the text you want to compare it to into the second box.
- Review the result — it updates live as you edit either box.
- Copy or download the comparison result.
Key features
- Compares instantly, with no file upload required.
- Both texts stay private in your browser.
- Free to use, with no limit on text length.
- Useful for reviewing edits, translations, or duplicate content.
Questions
Frequently asked questions
Is the Text Diff Checker free to use?
Yes — the Text Diff Checker is completely free, with no sign-up, no trial period, and no hidden limits.
Is my text uploaded anywhere when I use the Text Diff Checker?
No. The Text Diff Checker runs entirely in your browser using JavaScript. Your text is processed on your own device and is never sent to a server.
Can I use the Text Diff Checker on my phone?
Yes. The Text Diff Checker works in any modern browser, including on mobile devices, with no app to install.
Is there a limit to how much text I can use?
There's no artificial limit. Because everything runs in your browser rather than on a server, the Text Diff Checker can generally handle as much text as your device can comfortably process.
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