JWT Decoder
Decode JSON Web Tokens (JWT) and view the header and payload. Inspect token contents without any server calls.
About JWT Decoder
The JWT decoder inspects a JSON Web Token and shows its header and payload contents in a readable, formatted view.
JWTs are the standard for authentication tokens and signed API payloads. During development you often need to see what claims are inside a token you received or generated. This tool splits the token into header and payload and decodes the Base64 sections for inspection.
When to Use JWT Decoder
Use it to verify what claims your login token carries, to debug why an API rejected a token, or to inspect the expiry and issuer fields while building auth.
Pro Tip
Decoding only reveals the header and payload — the signature verifies authenticity and will not be readable as plain data; that's expected.
Key Features
Processes JWT Token directly in your browser
Produces header, payload instantly
Completely free with no usage limits
No registration or account required
How to Use
Provide the required input (JWT Token).
The tool processes everything locally in your browser and instantly produces the following results: Header, Payload.
Review the result, then copy it to your clipboard or download the output file directly from this page.
Privacy note: JWT Decoder runs 100% in your browser. Your data is never uploaded to any server, so nothing is stored or shared.
Benefits
Your data never leaves your device when using JWT Decoder - everything runs locally
Get accurate results in seconds
Works on desktop, tablet, and mobile
No software download or installation needed
Frequently Asked Questions
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