Random Bytes Generator
Generate cryptographically secure random bytes in hex, Base64 or decimal using the Web Crypto API.
Local processingRandom Bytes Generator
What is Random Bytes Generator?
Random Bytes Generator creates unpredictable byte sequences suitable for tokens, salts and test data. Values come from the browser cryptographic random number generator rather than Math.random().
How It Works
crypto.getRandomValues fills a typed array with cryptographically strong random bytes. The bytes are then formatted as hexadecimal, Base64 or space-separated decimal numbers.
Common Use Cases
- Creating nonces and salts for development
- Generating test data with unpredictable values
- Producing random identifiers for local experiments
- Creating initialization vectors
Technical Details
Uses the Web Crypto API getRandomValues method, which is a CSPRNG backed by the operating system. Generation happens locally.
How to Use
Enter your input above. The result updates automatically. Use the copy button to copy the result.
Privacy
All processing happens in your browser. Your data is never uploaded to any server.
FAQ
Is Math.random used?
No. The tool uses crypto.getRandomValues, which is suitable for security-sensitive values.
Is my data uploaded to a server?
No. Everything runs locally in your browser. Your input never leaves your device.
Does Random Bytes Generator work on mobile?
Yes. The interface is responsive and works in modern mobile browsers without installing an app.