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About Text Diff Checker
The Text Diff Checker is a free online tool that compares two pieces of text and highlights the differences. Paste the original and modified versions to see additions (green) and deletions (red) side by side. Perfect for comparing source code, reviewing document changes, and tracking edits. Works entirely in your browser — completely private.
How to Use Text Diff Checker
Paste the original text in the first input area
Paste the modified text in the second input area
Click Compare to see the differences
Review additions (green) and deletions (red) side by side
Common Use Cases
Comparing versions of source code or configuration files
Reviewing changes in essays, articles, or legal documents
Tracking content edits and revisions
Frequently Asked Questions
How does the Text Diff Checker work?
Paste the original text in one box and the modified text in the other. Click Compare to see a side-by-side diff with additions highlighted in green and deletions highlighted in red.
What types of text can I compare?
You can compare any plain text — source code, essays, configuration files, legal documents, or any other text content. The tool shows line-by-line and word-by-word differences.
Is the Text Diff Checker free to use?
Yes, the Text Diff Checker is completely free. No sign-up, no limits, no hidden fees.
Is my data safe when using Text Diff Checker?
Yes. All processing happens directly in your browser. Your text is never sent to or stored on our servers.
Can I use Text Diff Checker on mobile?
Yes, the Text Diff Checker is fully responsive and works on all devices including smartphones and tablets.