API Key Generator
Generate secure, random API keys for your apps—free and no sign-up required.
How to Use This Tool
1. Set the Quantity: Choose how many API keys to generate (1–500).
Quick Option:
2. Generate: Click "Generate API Keys" to instantly create your keys.
3. Copy: Use the "Copy API Keys" button to grab and use them securely.
Custom Option:
2. Select Key Length: Pick your desired key strength, such as 256-char.
3. Choose Character Type: Use letters, numbers, or a mix for added randomness.
4. Add a Prefix (Optional): Include a custom prefix to help identify your keys.
5. Set a Separator: Choose how to separate multiple keys—new line, comma, etc.
6. Generate: Click "Generate API Keys" to instantly create your keys.
7. Copy: Use the "Copy API Keys" button to grab and use them securely.
All keys are generated locally in your browser for maximum privacy and security.
How to Use This Tool
Key Format Options:
UUID: Standard format (8-4-4-4-12). Globally unique, widely compatible. Best for resource IDs.
Hexadecimal: 0-9, A-F characters. Compact, URL-safe. Good for tokens and session IDs.
Base64: Maximum entropy per character. Shortest keys for given security level.
Alphanumeric: Human-readable A-Z, 0-9. Easier to transcribe manually if needed.
Configuration:
1. Set Length: Choose 16-128 characters. Recommended: 32+ for public APIs, 64+ for sensitive operations.
2. Add Prefix: Optional identifier (sk_live_, pk_test_). Helps distinguish key types and environments.
Generation:
3. Generate: Click to create cryptographically secure key using Web Crypto API. Each click generates unique key.
4. Copy & Store: Copy immediately. Store in environment variables or secrets manager. Never commit to git.
Keys generated client-side only. Not stored anywhere. Treat API keys like passwords - never expose in client code or logs.
API Key Generator: FAQ
The keys are generated using cryptographically secure random number generation (Web Crypto API). They are suitable for production use in applications requiring secure tokens.
For most applications, 32-64 characters provide excellent security. Use longer keys (128-256 chars) for highly sensitive applications. The strength indicator shows the relative security level.
Prefixes help identify the key type or environment. For example: "sk_live_" for production secret keys, "pk_test_" for test public keys. This is a common pattern used by Stripe and other APIs.
No. All keys are generated entirely in your browser and are never sent to any server. Once you leave or refresh the page, the keys are gone unless you copied them.