API Key Generator
Generate secure, high-entropy API key strings with custom prefixes.
API & Secret Key Generator
rxd_live_d7db165937f02fe8cba3978b6e4f4a84
About API Key Generator
The Cryptographic API Key Generator creates high-entropy, production-ready API keys with customizable prefixes (`sk_live_`, `pk_test_`, `app_`), character sets (Hex, Base62, Base64URL), and bit-lengths (128-bit, 256-bit, 512-bit) using the Web Crypto API.
How to Use API Key Generator
Step 1
Choose your preferred prefix and encoding format.
Step 2
Select entropy strength (128-bit to 512-bit).
Step 3
Specify the number of keys to generate.
Step 4
Click "Copy Keys" to paste into your database or environment file.
Practical Use Cases for API Key Generator
SaaS Platform Developer API Key Issuance
Generate Stripe-style prefixed API keys (`sk_live_28f9a...`) for public and private developer developer authentication.
Microservice Machine-to-Machine Secret Tokens
Generate high-entropy 256-bit shared secrets for webhook signing and backend service authentication.
Input & Output Examples
Generating Stripe-Style Live Secret Key
Prefix: "sk_live_", Entropy: 256-bit, Encoding: Base62
sk_live_9x8Fq2P1mK7L5vY3aZ0wE8tR6bN4cX2uI (256-bit cryptographically secure token)
Key Features & Performance
- ✓Powered by native browser `window.crypto.getRandomValues()` CSPRNG.
- ✓Custom prefixes: `sk_live_`, `pk_test_`, `bearer_`, `api_key_`, or custom user string.
- ✓Encodings: Base62 (Alphanumeric), Hexadecimal, Base64URL, and ASCII Safe.
- ✓Entropy strengths: 128-bit (Standard), 256-bit (High), and 512-bit (Maximum Security).
- ✓Batch generation: create up to 100 API keys simultaneously.
- ✓100% Client-Side generation guarantees secret privacy.
- ✓1-Click Copy and 1-Click `.txt` export.
Key Terminology & Definitions
CSPRNG (Cryptographically Secure Pseudo-Random Number Generator)
A random number generator with mathematical unpredictability suitable for generating secret cryptographic keys.
Key Prefix Routing (e.g. `sk_live_`)
A security best practice popularized by Stripe and GitHub that enables secret scanning tools to identify leaked keys automatically.