ToolsXpo

JWT Decoder

Decode JSON Web Tokens (JWT) to inspect their header and payload claims securely.

This tool has an API.Automate it from your code — 1 credit/call.Open in Playground
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Examples & Use Cases

Encoded JWT Token

eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1c2VySWQiOiAiYWRtaW4ifQ.signature...

Decoded Claims

{ "header": { "alg": "HS256", "typ": "JWT" }, "payload": { "userId": "admin" } }

Secure JSON Web Token Decoder

JSON Web Tokens (JWT) are the standard for securely transmitting session data between parties as a JSON object. Because the payload is merely Base64Url encoded (not encrypted), developers often need to inspect the claims inside the token during debugging. Our JWT Decoder easily unwraps the token to reveal its hidden data.

Does decoding a JWT compromise security?

No. A standard JWT payload is designed to be public and readable by anyone who holds the token. The security of a JWT relies entirely on its Signature, which prevents tampering. You should never store highly sensitive information like passwords or credit card numbers inside a JWT payload.

100% Privacy and Security

While JWT payloads shouldn't contain critical secrets, they often contain internal user IDs, email addresses, and active session identifiers. Pasting your active session tokens into a random server-side decoder is extremely risky. Our JWT decoder runs 100% locally in your browser. We do not transmit or log your tokens.

About JWT Decoder

Decode JSON Web Tokens (JWT) to inspect their header and payload claims securely. It's built for encoding, hashing and cryptographic workflows where an exact, reversible transform matters, runs instantly, and works on any device — no install, no sign-up.

How to use JWT Decoder

  1. Paste or type your input into the editor on the left.
  2. Leave the defaults, or tweak them if the tool exposes options.
  3. The result appears instantly on the right — everything runs in your browser, so nothing is uploaded.
  4. Copy the output, or download it, and you're done.

Why use JWT Decoder?

  • Fast and local — the transform happens in your browser, so there's no round-trip and no waiting.
  • Private by default — your input never leaves your device.
  • Accurate — the same, well-tested logic powers both this page and the public API.
  • Free — unlimited use in the browser, with an optional API for automation.

Use it from the API

Everything this page does is also available as a REST endpoint, so you can call JWT Decoder from your own code, a script or a CI pipeline.

Bash
curl "https://api.toolsxpo.com/v1/jwt-decoder" \
  -H "Authorization: Bearer txp_live_YOUR_KEY"

The endpoint returns a JSON envelope ({ ok, data, meta }) and costs 1 credit per successful call. Try it in the playground or browse the full API reference.

Frequently asked questions

Is JWT Decoder free to use? Yes — use it in the browser as much as you like. The optional API has a free tier and pay-as-you-go pricing for heavy or automated use.

Is my data private? Yes. JWT Decoder runs entirely in your browser — your input never leaves your device and nothing is logged or stored.

Can I automate JWT Decoder? Yes — call the jwt-decoder API endpoint from any language and script it into your workflow.

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