---
title: JWT Decoder API
slug: decode-jwt
url: https://apyhub.com/creightonnick0/service/decode-jwt
provider: nick creighton
categories: [Developer Tools, "Security & Privacy"]
tags: [jwt, token-decoding, authentication, security-tools, developer-tools]
auth: api_key
---

# JWT Decoder API

Decode a JWT from a token string and inspect its header, payload, and claims without verification. Useful for debugging auth flows and token contents.

## Endpoints

| Method | Path | Description | Atoms |
| --- | --- | --- | --- |
| POST | `` | What it does Decodes a JWT without verifying its signature and returns the header, payload, algorit… | 10 |

## About

## What it does
JWT Decoder decodes and inspects a JSON Web Token without verifying its signature. Send a single `token` string in the request body, and get back a structured JSON response for reading the token header, payload, and claims.

Use it when you need to debug authentication flows, inspect tokens from a client or gateway, or check what data is embedded in a bearer token before you wire up verification logic. Because it only decodes the token, it is useful for quick inspection during development and troubleshooting.

The input is a three-part JWT in base64url form. The service does not ask for keys or secrets, and it does not perform signature validation. That makes it a lightweight utility for looking at token contents, not for trusting them.

JWT Decoder fits into backend tooling, auth diagnostics, and API support workflows wherever you need to read a token’s structure fast.

## Usage

Authenticate with an ApyHub API key in the `apy-token` header.
Full docs and a live playground: https://apyhub.com/creightonnick0/service/decode-jwt