JWT Decoder
JWT Decoder is useful when you need to inspect what a token contains without verifying signatures manually or writing a quick helper script just to read the payload.
Decode JWT headers and payloads in the browser to inspect claims, timestamps, and token structure quickly.
When this tool helps most
- Checking token claims during frontend or backend authentication debugging.
- Inspecting expiry timestamps and user metadata in development environments.
- Confirming whether a copied token is structurally valid before testing it elsewhere.
Inspect JWT headers and payload claims
Paste a token to decode the header and payload sections quickly. This is for inspection only, not signature verification.
Header
Payload
How to use JWT Decoder
- 1 Paste the JWT into the input area.
- 2 Run the decoder to inspect the header and payload sections.
- 3 Review the decoded claims, timestamps, and structure before deciding the next debugging step.
Frequently asked questions
Does this verify the signature?
No. This tool is for inspection and decoding only, not signature verification.
Can I inspect expired tokens?
Yes. Expired tokens can still be decoded so you can inspect their claims and timestamps.
Is it safe for production secrets?
Use normal caution. The decoder runs in the browser, but highly sensitive tokens should still be handled carefully.
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