773511 Developer Tools

Online Developer Tools and Practical Technical References

Guide

JWT Decoder and Signature Verifier Guide

Step-by-step guide for using the jwt decoder and signature verifier.

Page Summary

Paste a JWT to review its header and payload, inspect claim values and optionally verify HS256, HS384 or HS512 signatures with a local secret.

Follow the structured steps below to finish the workflow faster.

JWT Inspection Workflow

Paste a JWT to review its header and payload, inspect claim values and optionally verify HS256, HS384 or HS512 signatures with a local secret.

Key Points

  1. Step 1

    Step 1

    Paste the JWT token into the input field to decode the header, payload and signature.

  2. Step 2

    Step 2

    Review the decoded claims, then enter a secret if you need to verify the HMAC signature.

  3. Step 3

    Step 3

    Use the converted date values to check claims such as exp, iat and nbf more easily.

Page Summary

JWT Inspection Workflow

Paste a JWT to review its header and payload, inspect claim values and optionally verify HS256, HS384 or HS512 signatures with a local secret.

Follow the structured steps below to finish the workflow faster.

JWT Inspection Workflow

Paste a JWT to review its header and payload, inspect claim values and optionally verify HS256, HS384 or HS512 signatures with a local secret.

Frequently Asked Questions

Frequently Asked Questions

Does this tool upload my JWT token?

No. JWT decoding and HMAC-based verification are performed in the browser during normal use.

Which signature algorithms are supported?

This page supports HS256, HS384 and HS512 verification for HMAC-based JWT tokens.

Can I review exp, iat and nbf as readable dates?

Yes. Standard JWT time claims are converted into easier-to-read date and time values.