Text Diff

Overview

• Compares two texts line by line and shows added and removed lines in different colors.
• Lets you compare the before and after of a configuration file, document, or code, and see at a glance what changed.
• Whether the text ends with a trailing newline is absorbed internally and does not affect the result, so you only see the changes that actually matter.

Usage

1. Enter the original text on the left and the text to compare against on the right.
2. Click the "Compare" button.
3. The differences are displayed line by line (+: added line, -: removed line, unchanged lines are shown as-is).

Example

Before:
apple
banana
cherry

After:
apple
blueberry
cherry

  apple
- banana
+ blueberry
  cherry

Use Cases

• Pasting code or a config file before and after a change to review what changed
• Comparing an old and new version of a document to identify additions and deletions
• Checking whether text shared by someone else exactly matches the text you have

FAQ

Notes

• Only line-level diffing is supported. Even if only part of a line changed, the entire line is treated as removed and added.
• The diff result exists only on the page and is lost on reload, so copy and save it if you need to keep it.
• Comparing very long texts may make browser processing slow.