Word Diff
Paste two versions of any text to highlight exactly which words were added or removed within each changed line. Line-level diffing tells you that a sentence changed, but word-level highlighting shows you precisely which words were edited, which is invaluable for proofreading copy edits, comparing translations, and reviewing legal or contract revisions. All diffing runs in your browser.
How it works
The diff algorithm runs in a Web Worker inside your browser, so the page stays responsive even for large files. All processing runs locally.
Processing runs in your browser
All diffing is done locally using browser APIs. Our servers are not involved at any point.
Related operations
For making the same change everywhere in one file, try find and replace. To put both inputs in matching order before comparing, use sort lines. For diffing two JSON payloads after pretty-printing, see the JSON formatter.