Text Diff Checker
Paste two versions of text and instantly see what changed. Additions, deletions, and modifications highlighted clearly.
Paste two texts above to compare them line by line. Perfect for comparing AI outputs.
How to use
- Paste the original text in the left panel
- Paste the modified text in the right panel
- Differences are highlighted automatically — green for additions, red for deletions
Frequently Asked Questions
What is a text diff?
A text diff compares two pieces of text and highlights the exact differences — additions, deletions, and modifications. It's the same concept used in Git and code review tools to track changes between file versions.
What can I use this diff checker for?
Common uses include: comparing code versions, checking AI-generated edits against originals, verifying translation changes, reviewing contract modifications, and comparing API response outputs.
Does this tool handle large text files?
Yes. The diff algorithm runs efficiently in your browser and can handle texts with thousands of lines. For extremely large files (100K+ lines), performance may vary depending on your device.
Is my data private?
Yes. Both texts are compared entirely in your browser using a client-side diff algorithm. Nothing is sent to any server or third party.
Privacy
All comparison happens in your browser. Your text is never uploaded or stored anywhere.