JWT Diff & Compare
Paste two JWTs 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 JWTs
Example Output
differing claims highlighted
How to Use
- 1Paste the first JWTs (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 JWT Diff & Compare
JWT Diff & Compare decodes the header and payload of two JSON Web Tokens and compares their claims. You see which claims (sub, exp, role, etc.) differ without decoding by hand.
Decoding happens entirely in your browser — your tokens are never sent anywhere. Signatures are not verified (only the contents are compared).
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.