API Key Generator
Generate secure API keys with configurable length, character set, and optional prefix. Use with any authentication scheme. Code never leaves your device — formatting and validation run locally in your browser.
How to Use the API Key Generator
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Frequently Asked Questions
How long should keys be?
256 bits (43 base64 chars) for serious use; shorter only for low-stakes tokens.
URL-safe output?
Yes — base64url alphabet with no +/= characters that break URLs.
Crypto-random?
Browser cryptographic randomness — never Math.random for secrets.
Are generated keys uploaded anywhere?
No — generation runs locally in your browser, free with no signup.
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Last updated October 2026