API Key Generator - Create Secure API Keys Online

Generate secure API keys and tokens for your applications. Multiple formats available. Cryptographically random. Free, private, works offline.

Format

Length: 32 characters

Prefix (optional)

Number of Keys

Generated Keys

Click Generate to create API keys

Common Key Patterns

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Frequently Asked Questions

Very secure. We use the Web Crypto API for cryptographically secure random generation. Keys are never stored or transmitted.

Alphanumeric, hex, base64, UUID v4, and custom prefixed keys (like sk_live_xxx for Stripe-style keys).

Yes. Use the prefix field to add identifiers like 'api_', 'sk_live_', 'pk_test_' to your keys.

Yes, these keys are cryptographically secure. However, always transmit keys over HTTPS and store them securely.

32 characters minimum for production keys. 64+ characters for high-security applications. Longer keys provide more entropy but are harder to manage. Balance security needs with usability.

Prefixes identify key types: 'sk_' for secret keys (server-side only), 'pk_' for public keys (client-safe), 'test_' for testing environments, 'live_' for production. This helps prevent accidental key misuse.

No. Each generation uses cryptographic randomness, making duplicate keys astronomically unlikely (probability less than 1 in 2^256 for most formats).

Yes. Rotate keys every 90 days minimum, immediately after employee departures, or if a key may have been compromised. Many APIs support key rotation without downtime.

Never hardcode keys in source code. Use environment variables, secure vaults (like AWS Secrets Manager), or encrypted configuration. Never commit keys to version control.

Base64url is URL-safe: it replaces '+' with '-' and '/' with '_', and omits padding '='. Use base64url for keys in URLs or filenames. Standard base64 works for most other uses.

Common Key Patterns

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