🎫 Authentication & Tokens
Free Online Authentication & Tokens Tools
Decode and debug JSON Web Tokens (JWT), SAML responses, OAuth tokens, and OIDC flows. Essential tools for developers building authentication systems.
SAML Decoder
Decode and inspect SAML responses and assertions
SAML Response Decoder
Decode Base64-encoded SAML responses
SAML Validator
Validate SAML response structure and conditions
JWT Decoder
Decode and inspect JSON Web Tokens
JWT Encoder
Create and sign JSON Web Tokens
JWT Debugger
Debug and edit JSON Web Tokens in real-time
OIDC Debugger
Debug OpenID Connect authorization flows
OAuth Token Inspector
Inspect and decode OAuth access tokens
TOTP Generator
Generate Time-based One-Time Passwords
PKCE Generator
Generate PKCE code verifier and challenge pairs
Cookie Decoder
Parse and inspect HTTP cookie strings
API Key Generator
Generate secure random API keys
Frequently Asked Questions
What is a JWT token?
A JSON Web Token (JWT) is a compact, URL-safe token consisting of three Base64URL-encoded parts: a header (algorithm), a payload (claims), and a signature. It's used for stateless authentication — the server validates the signature without looking up a session.
What is SAML used for?
SAML (Security Assertion Markup Language) is an XML-based standard for Single Sign-On (SSO). It allows identity providers (like Okta or Azure AD) to pass authentication assertions to service providers, enabling one login across multiple applications.
What's the difference between OAuth, OIDC, and SAML?
OAuth 2.0 is an authorization framework (grants access). OIDC (OpenID Connect) adds identity on top of OAuth (authentication + authorization). SAML is an older XML-based standard for SSO, common in enterprise environments.
How do I verify a JWT signature?
Use our JWT Debugger to verify a token's signature by pasting your secret (for HMAC) or public key (for RSA/ECDSA). The tool checks that the header and payload hash match the embedded signature.