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OAuth PKCE Generator

Generate RFC 7636 OAuth PKCE code_verifier + code_challenge (S256 method) pairs. Verifier uses 48 bytes → 64-char base64url, challenge uses SHA-256. Code never leaves your device — formatting and validation run locally in your browser.

Runs on Web Crypto

100% Local Browser Native

How to Use the OAuth PKCE Generator

1. Set options

Adjust the settings for OAuth PKCE first.

2. Generate

Create your OAuth PKCE with one click.

3. Copy and reuse

Copy the result into your project; generate again for alternatives.

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Frequently Asked Questions

What is PKCE in OAuth?

Proof Key for Code Exchange — secures OAuth on public clients that can't keep secrets.

Code verifier rules?

43–128 URL-safe characters, cryptographically random every time.

S256 or plain?

S256 always — the plain challenge method is deprecated upstream.

Is my values uploaded anywhere when using OAuth PKCE Generator?

No — generation runs locally in your browser; unlimited saves on local tools.

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Last updated October 2026