Security
PKCE Generator
Generate a cryptographically secure PKCE code_verifier and corresponding code_challenge for OAuth 2.0 Authorization Code flows. Uses window.crypto.subtle — the verifier is never transmitted anywhere.
Calculations run locally in your browserTool
About this tool
PKCE Generator
The PKCE Generator creates RFC 7636-compliant code_verifier and code_challenge pairs using window.crypto.subtle SHA-256, with S256 and plain method support and verifier length control.
• Generate a PKCE pair to test an OAuth 2.0 PKCE flow during API integration development
• Verify that your implementation produces the correct code_challenge from a known verifier
• Understand PKCE flow mechanics before implementing in a mobile app or SPA
• Generate test credentials for load testing an OAuth authorization server
Next step
Continue with Utility Matrix tools for the next decision in this workflow.
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FAQ
What does this tool tell you?
The PKCE Generator creates RFC 7636-compliant code_verifier and code_challenge pairs using window.crypto.subtle SHA-256, with S256 and plain method support and verifier length control.
What affects the result most?
PKCE (Proof Key for Code Exchange) — RFC 7636 extension to OAuth 2.0 Authorization Code flow. code_verifier: cryptographically random string 43–128 chars, [A-Za-z0-9 - . _ ~]. code_challenge = BASE64URL(SHA256(ASCII(code_verifier))) for S256 method.
How should I use the result?
Use the output as a draft that you review against your actual environment. The generated structure is correct by construction; the values it assumes may not match your situation, so treat it as a starting template rather than a finished artifact.
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