Character 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
"color" vs "colour"
Example Output
"u" 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 Character Diff & Compare
Character Diff & Compare compares two texts character by character — the most granular level. Useful for spotting tiny differences like punctuation, spacing, or a single different letter.
Because it works per character and is Unicode-aware, emoji and multi-byte characters are correctly counted as a single unit.
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.