Random Bytes Generator

Generate cryptographically secure random bytes for testing and development. Output in Base64, Hex, or byte array format. Perfect for encryption testing, data generation, and binary data simulation.

Press to Generate
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<iframe
  src="https://numbergenerator.ai/random-bytes/"
  title="Random Bytes Generator"
  width="100%"
  height="600"
  frameborder="0"
  style="border:1px solid #e5e7eb;border-radius:12px;"
  loading="lazy"
  allow="clipboard-write"
></iframe>

Paste this code into your website to embed the Random Bytes Generator tool. The iframe will automatically adapt to mobile screens.

About this tool

This tool uses a cryptographically secure pseudo-random number generator (CSPRNG) to ensure fairness and security.

Tip: press Space to generate again.

About Random Bytes Generator

Generate cryptographically secure random bytes for testing and development. Output in Base64, Hex, or byte array format. Perfect for encryption testing, data generation, and binary data simulation.

How to Use Random Bytes Generator

  1. 1Select byte length
  2. 2Choose output format
  3. 3Set how many to generate
  4. 4Click 'Generate Bytes'

Features

  • Base64/Hex/Array formats
  • CSPRNG security
  • Up to 1MB per result
  • Batch generation

Frequently Asked Questions

What output formats are available?
Base64 encoding, hexadecimal string, and JavaScript byte array format are supported.
How many bytes can I generate?
You can generate from 1 to 1,048,576 bytes (1MB) per result. Multiple results can be generated in a batch.

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Secure & Private

All generation happens locally in your browser using Web Crypto API (CSPRNG). Your data never leaves your device. No tracking, no storage, complete privacy.