Diff Checker
Compare two blocks of text and highlight line-level changes.
Input Text
Ready to process
Result
Result will appear here after processing...
Text A is the main input above.
What is Diff Checker?
Diff Checker is a free online tool that helps you quickly process and refine text.Compare two blocks of text and highlight line-level changes.
How to use Diff Checker
- Paste your text into the Diff Checker input box
- Click the Process button to run the tool
- Copy or download the result
Example
Input:
line one
line two
Output:
line one
- line two
+ line three
Benefits
- ✅ Protect sensitive data before sharing
- ✅ Clean text quickly without manual edits
- ✅ Run everything locally in your browser
FAQ
Is Diff Checker free to use?
Yes. This tool is free and runs instantly in your browser.
Does my data leave my device?
No. Processing happens locally and nothing is uploaded.