JWT Decoder API

JWT Decoder decodes JWT tokens to reveal header and payload information without performing signature verification. It handles JSON web token decode from any language over REST, so you can inspect claims and expiry without adding a JWT library.

The JWT Decoder API provides a simple, reliable way to integrate jwt decoder functionality into your applications. Built for developers who need production-ready jwt decoder capabilities without the complexity of building from scratch.

View API Details →

Method Platform

Available on: JitPack

Quick Start

Using JavaScript

async function callJWTDecoderAPI() {
    try {
        const requestBody = {
    "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
};

        const response = await fetch('https://api.apiverve.com/v1/jwtdecoder', {
            method: 'POST',
            headers: {
                'x-api-key': 'YOUR_API_KEY_HERE',
                'Content-Type': 'application/json'
            },
            body: JSON.stringify(requestBody)
        });

        const data = await response.json();
        console.log(data);
    } catch (error) {
        console.error('Error:', error);
    }
}

callJWTDecoderAPI();

Using cURL

curl -X POST "https://api.apiverve.com/v1/jwtdecoder" \
  -H "x-api-key: YOUR_API_KEY_HERE" \
  -H "Content-Type: application/json" \
  -d '{
    "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c"
}'

Get your API key: https://apiverve.com

📁 For more examples, see the examples folder

Installation

Choose your preferred programming language:

📦 NPM (JavaScript/Node.js)

npm install @apiverve/jwtdecoder

View NPM Package → | Package Code →

🔷 NuGet (.NET/C#)

dotnet add package APIVerve.API.JWTDecoder

View NuGet Package → | Package Code →

🐍 Python (PyPI)

pip install apiverve-jwtdecoder

View PyPI Package → | Package Code →

💎 Ruby (RubyGems)

gem install apiverve_jwtdecoder

View RubyGems Package → | Package Code →

🐘 PHP (Packagist)

composer require apiverve/jwtdecoder

View Packagist Package → | Package Code →

🎯 Dart (pub.dev)

dart pub add apiverve_jwtdecoder

View pub.dev Package → | Package Code →

🤖 Android (JitPack)

implementation 'com.github.apiverve:jwtdecoder-api:1.0.0'

Package Code →

🐹 Go

go get github.com/apiverve/jwtdecoder-api/go

Package Code →

Why Use This API?

Feature	Benefit
Multi-language SDKs	Native packages for JavaScript, Python, C#, Go, and Android
Simple Integration	Single API key authentication, consistent response format
Production Ready	99.9% uptime SLA, served from 24 global regions
Comprehensive Docs	Full examples, OpenAPI spec, and dedicated support

Documentation

🏠 API Home: JWT Decoder API
📚 API Reference: docs.apiverve.com/ref/jwtdecoder
📖 OpenAPI Spec: openapi.yaml
💡 Examples: examples/

What Can You Build?

The JWT Decoder API is commonly used for:

Web Applications - Add jwt decoder features to your frontend or backend
Mobile Apps - Native SDKs for Android development
Automation - Integrate with n8n, Zapier, or custom workflows
SaaS Products - Enhance your product with jwt decoder capabilities
Data Pipelines - Process and analyze data at scale

API Reference

Authentication

All requests require an API key in the header:

x-api-key: YOUR_API_KEY_HERE

Get your API key: https://apiverve.com

Response Format

Every APIVerve endpoint returns the same envelope — check status, then read data:

{
  "status": "ok",
  "error": null,
  "data": { ... }
}

Example Response

A real response from the JWT Decoder API:

{
  "status": "ok",
  "error": null,
  "data": {
    "header": {
      "alg": "HS256",
      "typ": "JWT"
    },
    "payload": {
      "sub": "1234567890",
      "name": "John Doe",
      "iat": 1516239022
    },
    "signature": "SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c",
    "isExpired": false,
    "expiresAt": null,
    "issuedAt": "2018-01-18T01:30:22.000Z",
    "tokenAge": "2557 days",
    "algorithm": "HS256",
    "expiresIn": null,
    "notYetValid": false,
    "securityAnalysis": {
      "isUnsecured": false,
      "hasExpiration": false,
      "isLongLived": false,
      "issues": [
        "Token has no expiration (exp) claim — it never expires"
      ]
    },
    "warning": "This API only decodes JWT tokens. It does NOT verify signatures. Do not use for security validation."
  }
}

Support & Community

🏠 API Home: JWT Decoder API
💬 Support: https://apiverve.com/contact
🐛 Issues: GitHub Issues
📖 Documentation: https://docs.apiverve.com
🌐 Website: https://apiverve.com

Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

Security

For security concerns, please review our Security Policy.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

Built with ❤️ by APIVerve

apiverve_jwtdecoder

Runtime