🪪 Decode JWT • ⚡ Fast UI • 🔒 Runs locally in your browser
JWT Decoder
Decode JSON Web Tokens instantly and inspect the header, payload, token parts, and timestamp claims. Great for development, debugging, testing, and API workflows.
Status
Ready
Shows the latest decode state.
Parts
0
JWTs usually have 3 parts.
Header size
0
Characters in decoded header.
Payload size
0
Characters in decoded payload.
Token Input & Decoded Output
Paste a JWT and decode it locally. This tool does not verify signatures.
Ready
Live result
Updates when you decode or enable quick examples
Paste a JWT and click Decode JWT.
JWT format: header.payload.signature
Token Parts
Header
—
Payload
—
Signature
—
Timestamp Claims
exp / iat / nbf
Decoded timestamps will appear here if present.
What this tool does
It decodes Base64URL JWT segments and renders the header and payload as readable JSON for fast inspection.
What it does not do
It does not verify the token signature or confirm whether the token is trusted or authentic.
FAQ
Does this JWT decoder verify the signature?
No. This tool decodes and displays token parts, but it does not verify the JWT signature.
Does this tool upload my token?
No. JWT decoding runs locally in your browser.
Can I view exp and iat timestamps?
Yes. This tool attempts to render common Unix timestamp claims such as exp, iat, and nbf into readable dates.