a11y.skipToMainContent
1

Text Diff / Compare

Compare two blocks of text and see exactly what changed — added lines in green, deleted in red, unchanged in gray.

Was this tool helpful?
Send output to:
Advertisement

How to use Text Diff / Compare

  1. Paste the original text on the left.
  2. Paste the changed text on the right.
  3. Read the colored diff below.

What is Text Diff / Compare?

Useful for proofreading edits, comparing versions of a document, or reviewing config changes. Uses the longest-common-subsequence algorithm for accurate line-by-line diffing.

Advertisement

FAQ

Is this character-level or line-level?
Line-level. Each line is either unchanged, added, or deleted — no inline highlighting within a changed line.
Do you save the text I compare?
No, both texts are processed entirely in your browser and are never sent to or stored on any server.
Can I compare text from files?
Yes, you can paste content from any file; the tool works with plain text copied into the input fields.

Related tools

Author

MW
Marcus Webb"The DevTool Craftsman"

Full-Stack Developer & Tools Architect

Marcus has been writing code since the dial-up era. He has contributed to open-source developer tools, built CI/CD pipelines for startups, and debugged production incidents at 3 AM more times than he would like to admit. His philosophy is that the best developer tool is the one that gets out of your way, and he writes about practical tooling that helps teams ship faster with fewer headaches.

Advertisement