Diff Checker
Compare two texts and highlight differences.
Processed locally — files never leave your device
PLAIN, JSON, MARKDOWN, CSV · Max 2MB · Up to 2 files
Drop files here, or browse
PLAIN, JSON, MARKDOWN, CSV
How it works
Paste the original text on the left
Paste the modified text on the right
Differences are highlighted automatically
About Diff Checker
Compare two pieces of text side by side and see the differences highlighted. Find changes between code versions, document edits, or configuration files. Powered by JustUse.me — free, ad-free, and private. This tool runs entirely in your browser. Your files are never uploaded to any server.
Frequently asked questions
Can I compare code files?
Yes. The diff checker works with any text content including source code, configs, and documentation.
How are changes highlighted?
Added lines are shown in green, removed lines in red, and unchanged lines in the default color.