Free Online Tools

How To Use JWT Decoder

1

Paste your JWT token

Enter the full token string.

2

Decode it

The tool splits and decodes the header and payload.

3

Inspect the contents

View the decoded JSON header and payload.

Frequently Asked Questions

1. Does decoding verify the token signature?

No, this tool decodes the header and payload for inspection only — it doesn't verify the signature against a secret key.

2. Is my token sent to a server?

The token is sent to our backend to decode it, but it is not stored or logged afterward.

3. Can I decode any JWT?

Yes, as long as it's a structurally valid JWT (three base64url-encoded segments separated by periods), regardless of what signed it.

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