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Utilnivo

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Utilnivo

Decode Bearer Token Online

Decode Bearer JWT tokens from Authorization headers on your device.

No registration
  • On your device

Browse more in Developer or all tools.

Private on your device

Your information stays on your device and is not uploaded.

Related tools

What is a JWT decoder?

A JWT decoder reads the header and payload of a JSON Web Token without verifying signatures. Useful for debugging auth tokens locally—never paste production secrets into untrusted sites.

This decode bearer token online tool parses JWT access tokens copied from `Authorization: Bearer` headers. Strip the prefix, paste the token, and inspect claims when debugging API clients, mobile apps, and SPA auth flows.

Bearer tokens grant access to whoever holds them—treat decoded output as sensitive.

Short-lived access tokens limit exposure; still avoid sharing them in support channels.

How to use this tool

Paste the token without the `Bearer ` prefix (or paste the full header line if the tool strips it), then review decoded JSON.

Worked example

Example: copy `eyJhbG...` from a failing curl request, decode claims, and see missing `scope` before updating your OAuth client.

When to use this

  • Debugging Postman or curl Authorization headers.
  • Reading claims from mobile app network traces.
  • Validating token contents during pen-test remediation.

Common examples

  • Access token from OAuth login → inspect `exp`, `sub`, and `roles` claims.
  • Staging vs production token → compare `iss` and `aud` without verifying signature locally.
  • Expired session token → confirm `exp` timestamp against current time in the payload view.
  • Staging ID token → confirm `aud` matches your SPA client ID before release.
  • Expired refresh token → verify `exp` claim against local clock skew.

What people search for

Common mistakes

  • Pasting live passwords or secret keys into any online tool.
  • Decoding alone does not prove a token is valid—always verify in your app.
  • Leaving expired tokens in browser history on shared machines.

Related long-tail tasks

  • extract bearer token from curl command
  • decode oauth2 access token claims
  • bearer token vs api key difference

How it works

Paste a JWT (optionally with a Bearer prefix). The tool splits header, payload, and signature, Base64URL-decodes the first two segments, and pretty-prints them as JSON. Common time claims (iat, nbf, exp) are shown as timestamps. Signatures are displayed but not verified.

Limitations

Decoding a JWT does not verify its signature or prove the token is valid, trusted, or unexpired. Do not paste production secrets into untrusted tools.

Privacy and file handling

Your data stays on your device and is not uploaded.

Related JWT Decoder guides

These pages use the same jwt decoder with guides tailored to specific search intents.

FAQ

Frequently asked questions

Should I include the Bearer prefix?

Paste the JWT itself; remove `Bearer ` if the tool expects raw token text.

Are opaque bearer tokens supported?

Only JWT-formatted bearer tokens decode. Opaque tokens have no readable payload.

Is decode the same as validation?

No. Validation checks signature, expiry, issuer, and audience on the server.

Related pages

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