API Key Generator

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Generate cryptographically secure API keys in multiple formats: HEX, Base64URL, Alphanumeric, and UUID v4. Add a custom prefix to match your naming conventions (e.g., sk_, pk_, api_). All keys are generated using the Web Crypto API for true randomness.

Length:

Click "Generate Keys" to create API keys in multiple formats.

How to Use API Key Generator

1Set an optional prefix
2Choose the key length
3Click Generate Keys
4Copy any format

About API Key Generator

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Your Privacy is Protected

API Key Generator runs entirely in your browser. Your files and data are never uploaded to any server, never stored, and never shared. Everything happens locally on your device using secure browser APIs.

No server uploadNo account required100% freeWorks on all devices

Frequently Asked Questions

Are these keys truly random?

Yes. Keys use crypto.getRandomValues() from the Web Crypto API which provides cryptographically secure random bytes.

Why Use This Tool?

Files never leave your device

No upload to any server

Instant processing in browser

100% free, no account needed

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