Secret Key Generator (Django, Laravel, Rails, JWT…)
Generate framework secret keys securely: JWT HMAC secrets, Django SECRET_KEY, Laravel APP_KEY, Rails secret_key_base, WordPress salts, Fernet and AES keys.
Web frameworks sign sessions, cookies and tokens with a secret key that must be long, random and unique to each deployment. This generator makes the right kind of value for the common cases — JWT HMAC secrets, Django, Laravel, Rails, Flask, Auth.js, WordPress salts, Fernet and raw AES keys — using the browser’s cryptographically secure random generator, and shows it ready to paste into your configuration with its entropy.
How to use this tool
- Pick the framework or key type.
- Copy the config line into your .env file, settings file or secret manager.
- Restart the application.
- Generate a fresh value for every environment (development, staging, production).
Formula
Entropy = bytes × 8 for byte-based keys, or length × log₂(alphabet size) for character keys. Characters are drawn with rejection sampling, so every symbol is equally likely.
Django: 50 characters from 50 symbols ≈ 282 bits. WordPress: 64 characters from 92 symbols ≈ 417.5 bits per key. JWT HS256: 32 bytes = 256 bits, Base64URL-encoded to 43 characters.
Example
A JWT HS256 secret is 32 random bytes, written as 43 Base64URL characters with 256 bits of entropy. A Django key is 50 characters such as k#3v… from the alphabet a–z, 0–9 and !@#$%^&*(-_=+), about 282 bits.
Frequently asked questions
Is it safe to generate secrets in a browser?
The values come from crypto.getRandomValues, the same secure generator the browser uses for TLS, and they never leave the page. For automated deployments, generate them in your pipeline or secret manager instead.
What happens if I change the key?
Everything signed or encrypted with the old key stops working: users are logged out, signed links expire, and data encrypted with Laravel’s or Fernet’s key cannot be decrypted. Plan rotations.
Can I reuse one secret in several apps?
Do not. If one app leaks, every app sharing the key is compromised. Generate a separate secret per app and per environment.
Sources
Last updated:
Page address with these inputs: https://kakao.mobile/tools/secret-key-generator/
Cite or embed this tool
kakaoCalc. (2026, November 8). Secret Key Generator (Django, Laravel, Rails, JWT…). https://kakao.mobile/tools/secret-key-generator/
“Secret Key Generator (Django, Laravel, Rails, JWT…).” kakaoCalc, 8 Nov. 2026, kakao.mobile/tools/secret-key-generator/.
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