Text Diff Checker

Paste old and new text versions to instantly see what was added, removed, or modified.

Added Removed Changed Unchanged
Enter two text blocks to start comparing.
  1. Paste old content into the left "Original Text" field.
  2. Paste new content into the right "Updated Text" field.
  3. Click "Compare" to highlight differences (green: added, red: removed, orange: changed).
  4. Click "Swap" to exchange left and right text quickly.

When do you need this?

  • Document review — quickly find changes between two versions without reading line by line.
  • Pre-code-review check — get an overview of what changed before a formal review.
  • Contract or legal document updates — verify that all changes match expectations.

What do the colors mean?

Green highlights added content, red highlights deleted content, and orange marks modified sections, giving you an instant visual summary of differences.

Are whitespace and punctuation counted as differences?

By default all characters including spaces and punctuation are compared. You can adjust settings to ignore whitespace if needed.

Can it handle large blocks of code?

Yes, but very large texts may increase browser computation. Consider comparing in smaller segments for the best experience.

What does the Swap button do?

It swaps the left and right text, letting you reverse the comparison direction with a single click.

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