Random Data Generator
Generate random hex, bytes, and numbers
What is Random Data Generator?
Random Data Generator produces cryptographically secure random values in multiple formats: hex strings, Base64, binary, integers within a range, and UUIDs. Useful for testing, security key generation, and filling sample datasets.
When to use this tool
- Generating random hex strings for API keys or tokens
- Creating random bytes for encryption keys
- Producing random numbers within a specific range
- Filling test databases with random placeholder values
How it works
Uses the Web Crypto API (crypto.getRandomValues) to generate entropy, then formats the random bytes into the requested output format (hex, Base64, decimal, binary). This is cryptographically secure, unlike Math.random().
Security Guidelines
- Always use cryptographic randomness for security-sensitive values
- Never use Math.random() for passwords, keys, or tokens
- Set entropy length appropriately — 256 bits (32 bytes) for AES keys, 128 bits for most tokens
Examples
About Random Data Generator
Generate random hex, bytes, and numbers It runs entirely in your browser — no files are uploaded to any server, ensuring complete privacy and instant results.
- •Generate strong random passwords
- •Create UUIDs v4 and v7
- •Encrypt and decrypt with AES-256
- •Check password strength and entropy
Last updated: 2025-01-15
FAQ
Generate random hex, bytes, and numbers
Yes, completely free. No signup required.
Yes. Runs entirely in your browser, no files uploaded.
Yes, works on any device with a modern browser.
No, everything runs in your browser.