Utilities Web
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Text Diff Viewer

Compare and display text differences

How to Use

  1. Paste the original text in the "Before" field
  2. Paste the changed text in the "After" field
  3. The difference is automatically color-coded
  4. You can switch between "Unified View" and "Side by Side" display
  5. You can swap before and after with the "Swap Inputs" button

Use Cases

  • When checking changes during code review
  • When comparing changes in configuration files
  • When visually checking corrections in documents
  • When comparing configuration values before and after deployment to check differences

Frequently Asked Questions

What algorithm is used to calculate the difference? ▼

We use a line-by-line difference detection algorithm. Added lines are displayed in green, deleted lines in red, and unchanged lines are displayed as is.

Can I compare large text? ▼

Yes, large text can be compared as long as it is within the browser's memory range. However, for extremely large text exceeding tens of thousands of lines, processing may take time.

Can I copy the difference results? ▼

Yes, you can copy the difference results to the clipboard with the "Copy" button. It is copied in unified view format.

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