Text Diff Checker

How to compare text differences

Paste your original text in the left box and the modified version in the right box, then click Compare texts. The diff checker highlights:

• Red — removed lines (present in original, missing in modified)
• Green — added lines (new in modified)
• No highlight — unchanged lines (same in both)

The comparison uses a line-by-line diff algorithm (LCS-based) that runs entirely in your browser.

When to use a text diff checker

• Draft editing: See what changed between versions of an article, email, or document.
• Code review: Compare two code snippets to spot changes quickly.
• Config tracking: Check differences between old and new config files.
• Proofreading: Verify that only intended changes were made.

Is my text uploaded?

No. The diff computation happens locally in your browser. TinyToolbox never sees, stores, or transmits your text. No signup needed.

Frequently asked questions

How do I compare two texts?

Paste the original text on one side and the changed version on the other. The tool highlights additions, deletions, and changes line by line.

What do the colors mean?

Deleted lines from the original are marked in one color, added lines in the new version in another, so you can see exactly what changed.

Is it the same as git diff?

It uses the same line-based diff concept. For source code with git integration, use git itself; for quick text comparison — contracts, drafts, translations — this tool is faster.

Is my text uploaded?

No. Comparison runs locally in your browser, so confidential documents never leave your device.