Diff Checker
The Diff Checker compares two blocks of text side by side and highlights exactly what was added, removed, or changed - useful for code reviews, contract edits, and proofreading.
Spot every change
Paste an original and a revised version and the tool marks the differences line by line: additions, deletions, and modifications are colour-coded so nothing slips past. It is far faster and more reliable than eyeballing two documents to find what moved.
Practical uses
- Reviewing edits between two drafts of an article or contract.
- Comparing two versions of code or configuration.
- Checking that a copy-paste didn't drop or duplicate content.
Both texts are compared entirely in your browser, so sensitive documents never leave your device.
Frequently Asked Questions
What does the diff highlight?
It highlights additions, deletions, and changes between the two texts, so you can see exactly what differs.
Can I compare code with it?
Yes. It works well for comparing versions of code, configuration files, or any plain text.
Does it compare line by line or word by word?
It compares line by line and highlights the changed portions so differences are easy to locate.
Is my text kept private?
Yes. The comparison runs locally in your browser and nothing is uploaded.
Related Text Tools
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