Security & Token Tools
JWT encoder/decoder, UUID generator, password tools, and hash generator. Create and verify tokens, generate unique identifiers, decode JWT payloads, check password strength — all 100% client-side. Essential tools for API authentication, secure identity management, and developer security workflows.
12 Security & Token tools
- JWT Encoder — Create and sign JSON Web Tokens with HS256/HS512.
- JWT Decoder — Decode and verify JWT tokens.
- UUID v4 Generator — Generate random RFC 4122 compliant UUID v4.
- Base64 Decoder — Decode JWT payload sections encoded in Base64.
- Hash Generator — Generate MD5, SHA hashes — essential for security workflows.
- Password Generator — Create secure random passwords with customizable options.
- What is JWT? — Learn what JSON Web Tokens are and how they work.
- What is CORS? — Learn about CORS, same-origin policy, headers, and preflight requests.
- What is OAuth? — Learn OAuth 2.0 authorization grants, access tokens, and flows.
- How to Generate JWT in Node.js — Step-by-step guide to generating JWT tokens in Node.js.
- CSP Header Generator — Build, analyze, and generate Content Security Policy headers. Supports all CSP Level 3 directives with real-time output for Nginx, Apache, Express, Next.js, and more.
- OAuth Playground — Interactive OAuth 2.0 & OIDC lab — visualize flows, PKCE, tokens, and attacks in your browser.