JWT Decoder
Decode JSON Web Tokens
Browser-only processing
Signatures are not verified — this is a decoder, not a validator.
Related tools
More browser-based tools for this workflow.
What this tool does
Decode JWT tokens to inspect header, payload, and signature. Does not verify signatures.
JWT Decoder is a free developer utility that gets the job done without installing software or creating an account. The whole process runs inside this browser tab, so your input never leaves your device. Common searches that land here include jwt parser, jwt decoder.
Key features
- Decodes header and payload of any JWT (RFC 7519)
- Highlights standard claims (iss, sub, exp, iat) and shows expiry status
- Runs entirely in the browser — your tokens are never sent to a server
Common use cases
- Debugging auth flows and confirming claim contents
- Reading expiry and audience from a token you've been handed
Things to know
- Does not verify the signature — pair this with a JWT library if you need cryptographic trust
- Does not decrypt JWE (encrypted JWTs); those require the recipient's private key
Privacy & local processing
JWT Decoder processes everything inside your browser — your files and text are never uploaded to a server, never logged, and never shared with third parties.How to use JWT Decoder
- 01
Paste a JWT.
- 02
Read decoded header and payload.
- 03
Inspect claims.
Frequently asked questions
Is my data uploaded anywhere?
No. Every tool on WebToolsLabs runs entirely inside your browser. Your data never leaves your device.
Is this tool free?
Yes. All tools on WebToolsLabs are 100% free with no signup, no watermarks, and no usage limits.