Text Diff Checker

Compare two text or code snippets side-by-side. Instantly see additions, deletions, and changes highlighted with color-coded diff output.

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Visual Highlighting
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Text Diff Checker

Paste your original and modified text below, then click Compare to see the differences.

Comparison Results

Enter text in both fields and click "Compare Text" to see differences...

Understanding Text Diffs

Learn how to read and interpret diff outputs effectively.

What is a Diff?

A diff (difference) shows changes between two versions of text or code. Lines highlighted in green indicate additions, red shows deletions, and unchanged lines appear in gray. This visual representation makes it easy to track what changed between versions.

Common Use Cases

  • Code Reviews: Compare code changes before merging
  • Document Editing: Track revisions in contracts or articles
  • Configuration Files: Spot differences in settings between environments
  • Version Control: Understand what changed between commits
  • Debugging: Compare working vs. broken code to find issues

Reading Diff Output

Green lines (additions): Text that appears in the modified version but not in the original.

Red lines (deletions): Text that was in the original but removed in the modified version.

Gray lines (unchanged): Text that remains the same in both versions.

Frequently Asked Questions

Common questions about text comparison and diff tools.

Can I compare code files?

Yes! This tool works with any text, including code in JavaScript, Python, HTML, CSS, JSON, and more. The monospace font and line-by-line comparison make it ideal for spotting code changes.

Is my text data secure?

Absolutely. All comparison happens locally in your browser. Your text never leaves your device and is not sent to any server, ensuring complete privacy and security.

What's the difference between this and Git diff?

This is a simplified, visual diff tool for quick comparisons without needing Git or command-line tools. Git diff provides more advanced features like context control and patch generation, but this tool is faster for simple text comparisons.

Can I compare large files?

Yes, but very large files (10,000+ lines) may slow down your browser. For optimal performance, use this tool with files under 5,000 lines. For larger files, consider command-line diff tools.