JWT Decoder Tool
Decode and inspect JSON Web Tokens (JWT) to view header, payload, and signature information. Perfect for debugging authentication tokens and API responses.
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About JWT Tokens
What is JWT?
JSON Web Token (JWT) is a compact, URL-safe means of representing claims between two parties. It consists of three parts: header, payload, and signature, separated by dots.
Common Claims
- •
iss- Issuer - •
sub- Subject - •
aud- Audience - •
exp- Expiration Time - •
iat- Issued At - •
nbf- Not Before
Security Notes
This tool only decodes JWT tokens and does not verify signatures. Never share sensitive JWT tokens or use this tool with production tokens containing sensitive information.
Use Cases
- • Debugging authentication issues
- • Inspecting token claims
- • Checking token expiration
- • Understanding token structure