Secret Key Generator
Secret Key Generator running client-side on your device.
Your files and data are processed locally and never leave your device.
Cryptographic Secret Key & Token Generator
High-entropy random keys generated client-side via Web Crypto API for APIs, JWTs, and servers.
What is Secret Key Generator?
Secret Key & API Token Generator creates high-entropy cryptographic keys and authentication tokens for backend development. Generate 256-bit and 512-bit hex keys, Base64 strings, URL-safe API tokens, and framework secrets (Django, Rails, JWT) with CSPRNG security.
Unlike legacy online utilities that upload sensitive media and documents to remote cloud storage, Shadow Toolkit executes this entire operation directly within your browser's local runtime. Your raw data never crosses the network.
Key Capabilities
- Preset cryptographic key formats: 128-bit, 256-bit (AES), 512-bit, and custom byte lengths
- Encoding options: Hexadecimal, Base64, URL-Safe Base64, and Alphanumeric strings
- Framework presets for Django SECRET_KEY, Rails secret_key_base, and JWT secret seeds
- Hardware-backed CSPRNG randomness via crypto.getRandomValues()
- 100% private in-browser generation—secret keys are never transmitted over the internet
Common Use Cases
How to use Secret Key Generator
Select Key Type & Length
Choose 256-bit, 512-bit, or select a framework preset.
Select Encoding
Choose Hex, Base64, or Alphanumeric format.
Copy Secret Key
Click 'Copy' to paste directly into your .env environment file.
Save to Password Manager
Copy the cryptographically secure secret or password and store it safely in your encrypted password manager or .env environment file.
Frequently Asked Questions
AES-256 requires a 256-bit (32-byte) key, which is represented as a 64-character hexadecimal string or 44-character Base64 string.