Text Diff

It runs a longest common subsequence comparison at word level. Words present in both versions stay plain, while words unique to either side get flagged as additions or removals. Adjacent changes of the same type merge into one highlight for readability.

Yes, the comparison runs completely in your browser and has zero external dependencies. Contracts, offer letters, and unreleased copy never leave your machine, which matters when the documents are confidential.

Green background means the text exists only in the Changed version, so it was added. Red background with strike-through means it exists only in the Original, so it was removed. Everything unhighlighted matches in both.

It does. Whitespace runs are treated as their own tokens, so a double space collapsed to a single space, or a moved line break, shows up in the output. That's useful for catching formatting drift in code snippets and config files.

Speed and privacy, mostly. There's nothing to open, no document conversion, and no upload step. You paste, you read the highlights, you're done, which suits quick checks like verifying an edit someone claims they never made.

Word level. It splits both inputs on whitespace boundaries and compares token by token, so a one-word edit inside a long paragraph highlights just that word, not the whole line. For code review style line diffs, a dedicated code tool fits better.

They count characters, not words. If the badge reads +12 added, twelve characters of new text appeared in the Changed version. It's a fast sanity check that the edit is as small, or as large, as you expected.