DEVELOPER TOOLS / DEVTOOLS
JWT Decoder
Decode a JSON Web Token header and payload locally without verifying its signature.
Decoding only reveals token contents. It does not verify the signature, validate the issuer, or establish that a token is trustworthy.
ABOUT THIS TOOL
What JWT Decoder does
Read the Base64URL-encoded header and payload of a compact JSON Web Token in your browser. Decoding reveals token contents but does not authenticate the token or verify its signature.
Useful when inspecting claims during development. Treat tokens as credentials and avoid pasting live production secrets into shared devices.
How to use JWT Decoder
- Paste a three-part compact JWT into the input field.
- Select Decode to inspect the JSON header, claims, and signature segment.
- Review the decoded values and validate the token separately with its trusted issuer.
ANSWERS AND DETAILS
Frequently asked questions
What does this tool do?
Read the Base64URL-encoded header and payload of a compact JSON Web Token in your browser. Decoding reveals token contents but does not authenticate the token or verify its signature.
When is this tool useful?
Useful when inspecting claims during development. Treat tokens as credentials and avoid pasting live production secrets into shared devices.
Is my input uploaded?
No. This tool runs in your browser and does not send the value you enter to a processing server.