Text Diff Tool
Compare two texts side by side and instantly highlight what was added, removed, or changed. Perfect for reviewing edits, code changes, and contract revisions.
How to Use
Paste the original text in the left box and the modified text in the right box, then click "Compare". Added words are highlighted in green, removed words in red. The diff is computed at the word level using the jsdiff library for precise, readable results.
Why Choose This Tool?
This tool uses the industry-standard Myers diff algorithm (via jsdiff) to produce minimal, accurate diffs. It runs entirely in your browser, making it safe for sensitive documents like legal contracts, proprietary code, and confidential reports.
Frequently Asked Questions
What do the colors mean?
Green highlights indicate text that was added in the modified version. Red highlights indicate text that was removed from the original. Unchanged text has no background color.
Does it compare character-by-character or word-by-word?
The tool compares word-by-word using the diffWords method from the jsdiff library, which produces more readable results than character-level comparison.
Can it handle large documents?
Yes. The diff algorithm is efficient and handles documents with thousands of lines. However, very large documents may take a second or two to process.
Is it completely free?
Yes. No hidden fees, no limits, no ads.
Is my data safe?
Absolutely. All comparison happens locally in your browser. Nothing is sent to any server.