Text Diff Checker – Compare Documents
Compare two texts side-by-side and highlight differences. Perfect for code review, document comparison, and version tracking.
Our Text Diff Checker compares two texts and highlights additions, deletions, and common words. Ideal for comparing document versions, proofreading edits, or verifying changes. Word-level comparison makes it easy to see exactly what changed between two versions.
All processing happens locally in your browser. Your text never leaves your device. Paste both texts and click Compare to see additions (in text 2 only), deletions (in text 1 only), and common words.
Features
- Word-level comparison
- Additions & deletions
- Similarity score
- 100% client-side
- No registration
How to Use
Paste the first (original) text into the left input area.
Paste the second (modified) text into the right input area.
Click 'Compare Texts' to see additions, deletions, and common words.
Review the comparison. Use Clear All to start with new texts.
Frequently Asked Questions
What is word-level vs character-level diff?
Our tool compares by words. Additions are words in text 2 but not text 1; deletions are words in text 1 but not text 2. For character-level diff, use a dedicated diff tool.
Is my text sent to a server?
No. All comparison happens entirely in your browser using client-side JavaScript. Your text never leaves your device.
Does the tool handle large documents?
Yes. The tool processes text in memory. Very large inputs (e.g., 100k+ words) may slow down the browser. For best results, compare reasonable document sizes.