PKCE Generator & OAuth Debugger

Generate OAuth 2.0 PKCE code verifiers and SHA-256 challenges with authorization URL generator

PKCE Code Verifier & Challenge

Generate OAuth 2.0 / OIDC Proof Key for Code Exchange (RFC 7636) credentials.

Code Verifier (High-entropy secret)

Length: 0 characters (Requirements: 43 - 128 chars)

Code Challenge (BASE64URL-ENCODE(SHA256(verifier)))

Code Challenge Method: S256

Authorization Request URL Builder

Construct the full OAuth 2.0 authorization URL with PKCE params to initiate login flow.

Authorization Endpoint

Client ID

Redirect URI

Scope

State

Full Authorization URL

https://auth.example.com/oauth2/authorize?response_type=code&client_id=my-client-id&redirect_uri=http%3A%2F%2Flocalhost%3A3000%2Fcallback&scope=openid+profile+email&state=xyz123&code_challenge=&code_challenge_method=S256