Generate secure API keys in seconds! Our Free Online API Key Generator allows developers to create unique public and secret key pairs for authenticating requests to APIs, ensuring robust security and data integrity.
Whether you’re building a private API, an internal application, or a SaaS product, this tool helps you instantly generate cryptographically strong keys without any setup.
What Is an API Key?
An API key is a code passed in by a client to identify and authenticate the calling program or user. Most systems use a public key (shared openly) and a secret key (kept private) to ensure only trusted parties can access the API or resource.
Features of the API Key Generator
  • Public and Secret Key Pairs
    Instantly generate a matching pair of keys:
    • Public Key: Used in requests and shared openly.
    • Secret Key: Used to sign or verify requests—never share it!
  • Cryptographically Secure
    Uses strong random number generation for unpredictable, high-entropy keys.
  • Customizable Key Lengths
    Choose between 32, 64, 128, or 256 characters—or generate your own custom length.
  • One-Click Copy to Clipboard
    Easily copy public and secret keys for use in your apps, config files, or dashboards.
  • Client-Side Only
    Your keys are generated in your browser and never sent over the internet. 100% privacy guaranteed.
  • Ready for Production Use
    Perfect for API authentication, webhook validation, SDK integrations, and more.
Use Cases
  • Private API Access
    Authenticate internal services securely.
  • Third-Party App Integration
    Allow developers to access your API with unique credentials.
  • Webhook Security
    Use the secret key to sign and verify incoming webhooks.
  • SaaS Key Distribution
    Generate keys for your customers for app-level authorization.
How to Use
  1. Select Key Length or use default.
  2. Click “Generate API Keys”
  3. Copy Your Keys using the copy-to-clipboard buttons.
  4. Store the Secret Key Safely — treat it like a password!
Why Use This Tool?
  • No account needed
  • No rate limits or restrictions
  • No data stored or shared—privacy by design
  • Works in all major browsers
Example Output:
Public Key:  pk_9e6f7d02-a1c5-4f2b-8bde-302b9635d01f  
Secret Key:  sk_Q#z7lU2p!bD9rJ3T$wYxV6eZ^mNtGfKb
Start Generating Secure API Keys Instantly – No Sign-up Required!