Text Diff Checker
Compare two text blocks side by side to spot edits, missing lines, and small wording changes faster.
Paste original and revised text to generate a line-by-line comparison in your browser.
Text to compare
Paste both versions
Diff result
Unchanged, removed, and added lines
How it works
The diff compares the two inputs line by line and marks unchanged, removed, and added lines.
It uses the longest common subsequence of lines to keep inserted or deleted lines aligned in the result.
Common use cases
- Compare draft copy, release notes, or config snippets
- Spot missing or added lines in copied text
- Review documentation edits before sharing
- Check small text changes without opening a separate diff app
Frequently asked questions
What does text diff checker do?
It compares two text blocks and marks unchanged lines, removed lines, and added lines.
Is text diff checker free to use?
Yes. You can use this tool for free without registration.
Does my text leave my browser?
No. The comparison is handled locally in this static page using client-side JavaScript.
Related tools
How to use
Paste the original and revised text, then compare them line by line.
- Paste the older version into the Original text box.
- Paste the newer version into the Revised text box.
- Click Compare Text to review unchanged, removed, and added lines.
Use cases
Use it when you need a quick local comparison without opening a separate diff tool.
- Compare draft copy, release notes, or config snippets before sharing.
- Spot missing or added lines in text copied from another source.
- Review small changes while writing documentation, tickets, or code comments.
Example
A quick example of how this tool works.
Input
Sample input for Text Diff Checker
Output
Processed output from Text Diff Checker