Diff Checker
Compare two text blocks and highlight differences line by line. Perfect for code reviews and document comparison.
Compare two text blocks and highlight differences line by line. Perfect for code reviews, document comparison, and version control workflows.
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Line-by-line text comparison
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Color-coded difference highlighting
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Side-by-side and unified diff views
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Character-level change detection
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Copy comparison results
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Perfect for code reviews
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No registration required
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Completely free
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Works in your browser
How to Use
- Paste your original text in the left text area
- Paste your modified text in the right text area
- Choose comparison options (ignore whitespace, case sensitivity, view mode)
- Click Compare Texts to see the differences highlighted
- Review added (green), removed (red), and modified (yellow) lines
Frequently Asked Questions
What is the difference between side-by-side and unified view?
Side-by-side shows both texts in parallel columns. Unified view shows changes in a single column with + and - indicators.
Should I ignore whitespace differences?
For code comparison, usually yes. For document comparison where formatting matters, you might want to keep whitespace differences visible.
Can I compare large files?
Yes, but very large files may take longer to process. The tool works best with files under 10,000 lines.
How accurate is the diff detection?
The tool uses advanced diff algorithms to detect changes at both line and character levels for precise comparison.