Small crypto tools. No accounts. No nonsense.

Generate secrets and hashes locally in your browser using the Web Crypto API. Nothing is uploaded.

Open tools

Tip: pin this page. Uses secure randomness via crypto.getRandomValues.

SHA 256

Web Crypto

Input

Output format

Output

Tools

Password generator

Secure random

Length

Uppercase Lowercase Digits Symbols

Output

Random number

Uniform int

Min

Max

Output

NextAuth style secret

32 bytes

Generates 32 bytes of secure randomness encoded as base64url. Good for NEXTAUTH_SECRET.

Output