UtilFoundryDEV TOOLS

JWT RS256 Verifier

Verify an RS256 token against a JWK you paste, using Web Crypto in this tab.

  • 100% Free
  • No account required
  • Runs in your browser
  • No data is uploaded
Local saving paused

Private to this browser, not a cloud backup. Saves expire 7 days after the last save. Avoid saving sensitive data on shared devices.

Local saving is disabled for this sensitive tool. Use sanitized test data and clear the editor when finished.

Saved JWT RS256 Verifier workspaces

Saved only on this device. Clearing browser data removes your workspaces. Expired saves are removed when this app next checks storage.

No saved workspaces for this tool yet.

No settings needed
2 documents to Verification result

Input

Paste the token and the jwk public key, then click “Run tool”.

Token
Ln 1, Col 1Spaces: 2UTF-8JWT + JWK452 bytes
JWK public key
Ln 1, Col 1Spaces: 2UTF-8JWT + JWK373 bytes

Output

Verification result (read-only).

Read-only
Text
Ln 1, Col 1Spaces: 2UTF-80 bytes
Ready when you arePaste your input, then press Run tool or ⌘ ↵