Developer Tools

Free, browser-based utilities for authentication, security, and web development. Your data never leaves your browser.

100% Client-Side No Data Sent Instant Results

Token & JWT

JWT Decoder

Decode

Decode and inspect JSON Web Tokens. View header, payload, signature details, expiration status, and claims.

JWT Generator

Create

Build and sign JWTs with custom claims, headers, and algorithms. Supports HS256, HS384, and HS512.

PKCE Generator

OAuth2

Generate code_verifier and code_challenge pairs for secure OAuth2 authorization code flows with PKCE.

Authentication & Protocols

Passkey Debugger

WebAuthn

Test and debug WebAuthn/FIDO2 passkey support in your browser. Create credentials and test authentication.

OIDC Discovery

OpenID Connect

Fetch and inspect OpenID Connect discovery documents. Analyze endpoints, scopes, grant types, and provider configuration.

CORS Tester

HTTP

Test CORS policies for any endpoint. Inspect Access-Control headers, preflight responses, and troubleshoot cross-origin issues.

Security & Cryptography

Password Hash Generator

Hashing

Generate secure password hashes using SHA-256, SHA-512, and PBKDF2. Verify passwords against existing hashes.

Certificate Decoder

X.509 / PKI

Decode PEM-encoded X.509 certificates. View subject, issuer, validity, serial number, and ASN.1 structure.

Encoding & Utilities

Base64 / URL Encoder

Encoding

Encode and decode Base64, Base64URL, URL encoding, and hexadecimal. Essential for debugging auth flows and API integrations.

UUID / ULID Generator

Identifiers

Generate UUID v4, v7, and ULID identifiers. Supports bulk generation with copy-to-clipboard and case options.

Your Privacy, Our Priority

Every tool on this page runs entirely in your browser using the Web Crypto API. Your data, tokens, passwords, and certificates are never transmitted to any server. There is nothing to trust because nothing ever leaves your machine.

Client-Side Only

All processing happens in your browser using native APIs

Zero Server Calls

No backend, no APIs, no data collection whatsoever

Open Standards

Built on Web Crypto API, RFC specifications, and open standards

Need a complete authentication solution?

AuthAction provides secure, scalable authentication services so you can focus on building your application.

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