Word Diff & Compare
Paste two texts to see highlighted line-by-line differences, a change summary, and a similarity percentage. Everything is processed on your device.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
"the quick fox" vs "the slow fox"
Example Output
quick (removed) slow (added)
How to Use
- 1Paste the first texts (A) in the left box and the second (B) in the right box.
- 2Adjust the options if needed (ignore case, whitespace, or empty lines).
- 3Click Compare (or press Ctrl+Enter).
- 4See the highlighted differences, a summary of how many changes there are, and the similarity percentage. Switch between side-by-side / unified / inline views.
About Word Diff & Compare
Word Diff & Compare highlights differences at the word level rather than the line level. Ideal for prose where a long line changes slightly — you immediately see which words were added or removed.
The inline view merges both versions with removed words struck through in red and new words highlighted in green, so it reads naturally in one flow.
FAQ
What is the difference between "diff" and "compare"?
Both are done by the same tool. "Diff" highlights the lines/parts that changed (added/removed), while "compare" shows how similar the two inputs are (similarity percentage + summary). You get both at once here.
Is my data sent to a server?
No. The entire comparison is computed in your browser with JavaScript. Nothing is uploaded, logged, or stored on our servers — safe for sensitive data.