Diff checker
Paste two blocks of text or code and see what changed, line by line. Runs entirely in your browser - nothing is sent anywhere.
This tool compares the two blocks of text line by line and highlights lines that were added or removed between the original and changed versions. Unchanged lines are shown without a marker, added lines are prefixed with +, and removed lines are prefixed with -.
Everything happens locally in your browser. Nothing you paste here is sent to a server, logged, or stored.
Frequently asked questions
What kind of diff does this produce?
A line-based diff, similar to git diff. It compares whole lines rather than individual characters or words, so it works well for code, config files, and paragraphs of text.
Can I compare code files?
Yes, paste the contents of any two text or code files into the boxes above and click Compare.
Is there a size limit?
No hard limit is enforced, but very large inputs (thousands of lines) may be slow to compare since everything runs in your browser tab.