Unicode Diff & Compare
Paste two Unicode 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
two texts that look identical
Example Output
differing code points
How to Use
- 1Paste the first Unicode 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 Unicode Diff & Compare
Unicode Diff & Compare compares two texts by each character's code point. This finds invisible differences like look-alike characters (homoglyphs), zero-width spaces, or different normalization forms.
Each character is shown with its U+XXXX code, so characters that look the same but are actually different are immediately revealed.
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.