In short: Text Diff Checker compares two pieces of text and highlights added lines in green and removed lines in red.
Processed locally in your browser
Your files and text are handled entirely on your device using your browser. They are never uploaded to our servers.
Comparison runs locally in your browser. Your text is never uploaded.
How to use Text Diff Checker
3 quick steps. Most people are done in under a minute.
- 1
Paste the original text on the left.
- 2
Paste the edited text on the right.
- 3
Review the highlighted differences.
Text Diff Checker features
- Side-by-side comparison of two texts
- Added and removed lines clearly highlighted
- Works with documents, code and data
- Comparison runs in your browser
When to use Text Diff Checker
- Check what changed between two contract versions
- Review edits made to an essay or article
- Compare config files or code snippets
About this tool
Paste two versions of a document and instantly see the differences highlighted — added lines in green, removed lines in red. Perfect for checking edits and revisions.
Text Diff Checker FAQ
How do I compare two texts for differences?
Paste the original text in the first box and the new version in the second. Differences are highlighted instantly — green for added, red for removed.
Can I compare code with this tool?
Yes. The diff works line by line, which makes it well suited to code, JSON and configuration files.
Is it safe to use this tool with private texts?
Yes. Your texts are processed entirely in your web browser using JavaScript on your own device. Nothing is uploaded to FaaTools servers, so we never see, store or share your data — you can even disconnect from the internet after the page loads and the tool keeps working.
Is Text Diff Checker free to use?
Yes, Text Diff Checker is 100% free with no sign-up, no watermark and no daily limits. FaaTools is supported by unobtrusive ads, which keeps every tool free for everyone.