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Hndy Tools

API Key Generator

Generate secure, random API keys with customizable options

Security
Generator
API

Length: 8-256 characters (recommended: 32+)

Generate 1-100 keys at once

e.g., sk_, api_, myapp_

About This Tool

The API Key Generator creates cryptographically secure random keys for API authentication and authorization. This tool is perfect for developers building REST APIs, managing service integrations, or implementing secure access control systems.

Choose from multiple formats including hexadecimal (most common), alphanumeric, Base64, or standardized UUID v4. Customize the key length, add prefixes for easy identification, and generate multiple keys at once for batch operations.

Privacy & Security: All API keys are generated locally in your browser using the Web Crypto API (crypto.getRandomValues), which provides cryptographically secure random values. No data is transmitted to any server, ensuring your keys remain completely private.

Best Practices: Always use keys that are at least 32 characters long for production systems. Add a prefix to help identify key types and make them easier to detect in code. Never hardcode API keys in your source code—use environment variables or dedicated secret management solutions instead.

Frequently Asked Questions (FAQ)

What is an API key?
An API key is a unique identifier used to authenticate requests to an API. It acts as a secret token that grants access to API resources and helps track usage.
How secure are the generated API keys?
The API keys are generated using cryptographically secure random number generation (crypto.getRandomValues). All processing happens in your browser, and no data is sent to any server.
What format should I use for API keys?
Hexadecimal is the most common format for API keys due to its compact size and URL-safe nature. Alphanumeric is also popular for human-readable keys. Base64 provides high entropy in fewer characters. UUID is useful when you need a standardized format.
What is the recommended length for API keys?
For production use, we recommend at least 32 characters for hex format or 24 characters for alphanumeric. Longer keys (64+ characters) provide additional security against brute-force attacks.
Should I include a prefix in my API keys?
Yes, prefixes like "sk_" (secret key), "pk_" (public key), or your service name help identify the key type and make it easier to detect leaked keys through code scanning tools.
When should I use timestamps in API keys?
Including timestamps can help with key rotation and expiration policies. However, it reduces the randomness space. Use timestamps only if your system requires time-based key management.
How should I store API keys securely?
Never commit API keys to version control. Store them in environment variables, use secret management services (like AWS Secrets Manager, HashiCorp Vault), and always hash keys before storing in databases.