API Key Generator
Generate secure random API keys with customizable prefixes, lengths, and encodings client-side.
Generate Secure API Keys
API keys are used by developers to authenticate requests between clients and servers. This tool uses cryptographically secure random bytes to generate unique API keys in formats like Hex, Base64, and Base62, with optional custom prefixes.
A prefix helps identify the key owner or environment (e.g. public, secret).
Ready to generate.
API Key Best Practices
For production systems, ensure that your API keys have at least 128 bits of entropy (16 random bytes). Prefixes like sk_live_ are useful for identifying key scopes (secret vs. public, live vs. test) and making it easier for automated tools to scan and prevent code repositories from leaking active credentials.
How to use the generator
- Specify a prefix (e.g.
api_key_) to prepend to the random characters. - Choose the length of random bytes (32 bytes is recommended for maximum security).
- Select the output encoding (Base62 produces clean alphanumeric keys).
- Click Generate API Key and copy the result.
