Text Compare
Paste an original and a revised version — every added and removed line is highlighted, in order.
What is a diff good for?
Checking two versions of a contract or article before sending, reviewing what changed between config files, verifying a translation edit, or spotting what a colleague quietly altered in shared notes. Lines are compared exactly — a trailing space counts as a difference (the Whitespace Cleaner can strip those first).
Built for real-world comparisons
Typical uses go beyond proofreading: reviewing what changed between two versions of a configuration file, checking that a contract edit only touched the clause you intended, comparing exports from two systems to find missing records, or verifying that a translation preserved every line. Because comparison is line-based, it stays readable even for long documents — unchanged lines are dimmed so your eyes go straight to what moved.
Frequently asked questions
How are differences matched?
The tool aligns both texts line by line using a longest-common-subsequence diff — the same approach as git diff — so moved paragraphs appear as a removal plus an addition rather than a total rewrite.
Is my text uploaded?
No. The comparison runs entirely in your browser. Contract drafts and confidential documents never leave your device.