API Key Generator
Select character types to generate keys.
256 bits → 43 chars
Strong
Character sets
Uppercase (A-Z)
Lowercase (a-z)
Numbers (0-9)
Symbols
Secure API Key Generator
Generate cryptographically secure API keys directly in your browser using the Web Crypto API (window.crypto.getRandomValues). No keys are stored or sent to any server.
How it works
- Choose how many keys to generate (1–1000).
- Select bit length (entropy level) for each key.
- Pick character sets to customize how your keys look.
- Optionally add a prefix or postfix for easy identification.
- Copy individual keys, all keys at once, or download as a text file.
Choosing key strength
- 128 bits: Suitable for less sensitive services.
- 256 bits: Recommended for most API integrations.
- 512+ bits: Use for security-critical systems.
Security note
Keys are generated locally on your device. They are never transmitted to our servers or stored.