Developer Tools
PKCE Code Generator
Generate PKCE (Proof Key for Code Exchange) code verifier and challenge pairs for secure OAuth flows. Essential for public clients and SPAs.
PKCE Configuration
Configure the code challenge method
S256 is recommended for security. Plain method should only be used if SHA256 is not available.
Generated PKCE Codes
Use these codes in your OAuth PKCE flow
Click "Generate PKCE Codes" to create your code verifier and challenge
PKCE OAuth Flow
- 1. Client: Generate code_verifier and code_challenge
- 2. Authorization Request: Include code_challenge and code_challenge_method in auth URL
- 3. User: Authenticates and grants permissions
- 4. Callback: Authorization server returns authorization code
- 5. Token Exchange: Send authorization code + code_verifier to get tokens
- 6. Verification: Server verifies code_verifier matches code_challenge
Authorization Request
Add these parameters to your OAuth URL
https://auth.example.com/oauth/authorize?
client_id=your_client_id&
redirect_uri=your_callback&
response_type=code&
code_challenge=generated_challenge&
code_challenge_method=S256&
scope=openid profileToken Exchange
Include code_verifier in token request
POST /oauth/token
Content-Type: application/x-www-form-urlencoded
grant_type=authorization_code&
code=received_auth_code&
client_id=your_client_id&
code_verifier=generated_verifierWhy Use PKCE?
Security Benefits
- • Prevents authorization code interception attacks
- • No client secret required (perfect for SPAs)
- • Cryptographically secure code verification
- • Mitigates risks in public clients
Use Cases
- • Single Page Applications (SPAs)
- • Mobile applications
- • Desktop applications
- • Any public OAuth client
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