Text Diff Checker

Compare two versions of any text, such as contracts, essays, code or lists. Added and removed lines are highlighted, with word-level changes inside each line. You can ignore case or whitespace, and see a summary of changes.

How it works

The checker finds the longest common subsequence of lines between the original and the changed text. Lines only in the original are marked removed, and lines only in the new text are marked added. When a line was edited, the exact words that changed are highlighted inside it. Everything runs in your browser.

Frequently asked questions

Can I compare two Word documents?

Copy the text from each document into the two boxes. Formatting isn't compared, only the text.