Header + payload decode
Algorithm, type, and claims all readable side by side.
Dev Workbench
Inspect JWTs without touching the secret →
Decode header and payload claims locally so you can debug sessions safely.
#jwt#auth#decodeFree · Unlimited
Inspect the header and claims of a token
3Parts decoded
0Secrets exposed
<1sInspect time
Why it works
Header + built in
Claim inspector
Registered and custom claims laid out instead of buried in base64.
Local-only processing
Tokens are decoded in your browser session, never uploaded.
Where it pays off
Made for real workflows
Session debugging
Figure out which claims a broken session is actually carrying.
Access-token audits
Review exp, scope, and issuer claims across tokens.
OAuth flows
Trace what identity providers put inside their tokens.
FAQ
Quick answers
Do you verify the signature?
No — decoding reads the payload. Signature verification stays with your auth layer.
Is the token sent anywhere?
No. Everything happens locally in your session.
developer-toolsFree
JSON Formatter
Beautify, minify, and validate JSON payloads with configurable indentation.
developer-toolsFree
JSON Validator
Check JSON syntax and get a precise error location when something is off.
developer-toolsFree
Base64 Encoder
Encode text to Base64 and decode Base64 back to readable text.
Every tool is free, forever.
JWT Decoder runs with no account, no credit card, and no usage limits — just open the workspace and go.