Developer Tools

JWT Decoder Examples

Review practical JWT Decoder examples so you can understand expected input, output, and common patterns faster.

Why examples matter for JWT Decoder

Use this free JWT Decoder to inspect JSON Web Tokens quickly in the browser. It helps you read JWT header and payload data, check common claims such as exp, iat, iss, aud, sub, and understand what a token contains during API development, authentication debugging, and integration testing. Paste a JWT token to decode it instantly without writing code or manually splitting Base64 URL segments.

Example pages are especially useful for developer tools because they show what good input looks like, what kind of output to expect, and how the tool behaves in common scenarios.

JWT Decoder examples

Decode a basic JWT with readable claims

Input

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.signature

Output

Header and Payload JSON

Useful when you want to inspect standard claims and basic token structure.

Check expiration claim

Input

eyJhbGciOiJIUzI1NiJ9.eyJleHAiOjE3MzU2ODk2MDAsInN1YiI6InVzZXIxIn0.signature

Output

Decoded payload with exp claim

Helpful when debugging expired or soon-to-expire tokens.

Inspect issuer and audience

Input

eyJhbGciOiJSUzI1NiJ9.eyJpc3MiOiJodHRwczovL2F1dGguZXhhbXBsZS5jb20iLCJhdWQiOiJhcGktY2xpZW50Iiwic3ViIjoidXNlcjEyMyJ9.signature

Output

Decoded payload with iss, aud, and sub

Useful for checking whether the token was issued for the correct app or API.

Inspect roles or permissions

Input

eyJhbGciOiJIUzI1NiJ9.eyJyb2xlcyI6WyJhZG1pbiIsImVkaXRvciJdLCJwZXJtaXNzaW9ucyI6WyJyZWFkIiwid3JpdGUiXX0.signature

Output

Decoded payload with roles and permissions

Useful for debugging authorization problems and role-based access rules.

Read custom claims

Input

eyJhbGciOiJIUzI1NiJ9.eyJ0ZW5hbnQiOiJhY21lIiwidXNlcl90eXBlIjoicHJvIiwidGllciI6ImdvbGQifQ.signature

Output

Decoded payload with custom claims

Helpful when your app stores tenant, plan, or account information in custom fields.

Inspect a token from an auth flow

Input

eyJhbGciOiJSUzI1NiIsImtpZCI6IjEyMyJ9.eyJzdWIiOiJ1c2VyLTEiLCJlbWFpbCI6InVzZXJAZXhhbXBsZS5jb20iLCJleHAiOjE3MzU2ODk2MDAsImlhdCI6MTczNTYwMzIwMH0.signature

Output

Decoded header and payload with user and timing claims

Useful when checking whether the token content matches the user who just signed in.

Invalid JWT with missing parts

Input

eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjMifQ

Output

Invalid JWT

A JWT normally contains three dot-separated parts: header, payload, and signature.

Invalid JWT with broken Base64 URL data

Input

invalid.token.value

Output

Invalid JWT

The decoder fails when token segments are not valid JWT data.

How to use these examples

Paste the full JWT token into the input box
Click Run Tool to decode the token
Review the header and payload shown in readable JSON format
Check important claims such as expiration time, issuer, subject, and audience
If the token cannot be decoded, verify that you pasted all three token parts correctly

Compare your own input with the JWT Decoder examples below before running the tool.
Keep the input format as close as possible to the example pattern when you test a new case.
If your output looks wrong, check spacing, separators, symbols, or the exact value type first.

Common mistakes in sample input

Pasting only one or two token parts instead of the full JWT

Fix: Make sure the token includes all dot-separated sections and was copied completely.

Expecting the decoder to verify the signature automatically

Fix: Use the decoder to inspect content only. Signature validation is a separate step.

Confusing standard Base64 with JWT Base64 URL encoding

Fix: JWT uses Base64 URL encoding, so a JWT-specific tool is the right choice.

Assuming the token is valid just because it decodes

Fix: A token can decode successfully and still be expired, forged, or signed with an invalid key.

Reading exp or iat without checking timestamp meaning

Fix: Interpret claims like exp and iat as Unix timestamps and compare them carefully.

Next steps

After reviewing these examples, run the live tool with your own input. If your task involves a follow-up step, the related page can help you move to the next tool in the workflow.

Run the main tool

Open the main JWT Decoder page and test your own real input.

Open JWT Decoder