API & Secret Key Generator
rxd_live_6e0ae97088932bfba3a70331b8108ec9
About JWT Claims Inspector
The JWT Payload & Claims Inspector decodes JSON Web Tokens without sending secrets to a server, providing structured inspection of standard RFC 7519 registered claims (`sub`, `iss`, `aud`, `exp`, `nbf`, `iat`, `jti`) and custom claims with human-readable timestamps.
How to Use JWT Claims Inspector
Step 1
Paste your encoded JWT string into the input box.
Step 2
Inspect the decomposed Header, Claims Payload, and Signature sections.
Step 3
Review human-readable translations of all Unix timestamp claims.
Step 4
Click "Copy Payload JSON".
Practical Use Cases for JWT Claims Inspector
Authentication & Session Token Debugging
Inspect JWT tokens returned by Auth0, Firebase, Supabase, NextAuth, or Cognito to verify user IDs, roles, and scope permissions.
Validating OAuth2 Audience & Issuer Claims
Verify that `aud` (audience) matches your API client ID and `iss` matches your authentication authorization server URL.
Input & Output Examples
Inspecting Auth0 JWT Token
eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTYiLCJuYW1lIjoiQWxleCIsImlhdCI6MTUxNjIzOTAyMn0...
Subject (sub): "123456" | Name: "Alex" | Issued At (iat): 2018-01-18 05:17:02 UTC
Key Features & Performance
- ✓Decodes JWT payload claims instantly with human-readable date and time formatting.
- ✓Breaks down standard RFC 7519 claims: `iss`, `sub`, `aud`, `exp`, `nbf`, `iat`, `jti`.
- ✓Displays token size in bytes, expiration countdown, and active status.
- ✓100% Client-Side memory execution guarantees token confidentiality.
- ✓1-Click Copy claims as clean JSON.
Key Terminology & Definitions
RFC 7519 Registered Claims
Standard predefined metadata fields in JWT payloads including `iss` (Issuer), `sub` (Subject), `aud` (Audience), and `exp` (Expiration Time).
Base64URL Decoding
The process of translating the middle segment of a JWT into UTF-8 JSON text without evaluating cryptographic signatures.