Diff Checker
Compare two text inputs and see differences highlighted.
About Diff Checker
Comparing two versions of text—old vs new, original vs edited—is easier when differences are highlighted. Our diff checker shows you exactly what changed. Paste the original in one box and the modified text in the other; the tool highlights added, removed, and changed lines. Useful for code, contracts, or any text you need to compare. Everything runs in your browser; your text is not sent to our servers. No sign-up. A clear, side-by-side way to see differences.
How to use Diff Checker
Paste the original text in the first box and the modified text in the second. Differences are highlighted for easy comparison.
Related guides for Diff Checker
Pro tips for Diff Checker
- Paste the original text in the first box and the modified text in the second.
- All processing runs in your browser—your input is not uploaded to our servers.
- Bookmark this page if you use this tool often.
FAQs about Diff Checker
What is a diff?
A diff shows what changed between two versions of text: added, removed, and sometimes modified lines.
Is my text uploaded?
No. Comparison is done in your browser; your content doesn’t leave your device.
Can I compare more than two files?
This tool compares two inputs. For more files, run multiple comparisons or use a dedicated diff tool.
Why are some lines highlighted?
Usually green = added, red = removed. Colors may vary by tool.