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Random Hex String Generator (256-bit)

Bulk generate cryptographically secure API keys, salts, tokens, and decode precise millisecond timestamps from UUIDv7.

Processing... 0%
Reading system entropy
Generating unique UUID blocks
Formatting exports
Done

Result

This page opens the secrets generator with the 256-bit hex salt type already selected — choose how many strings you need and copy them out.

Each value is 64 hexadecimal characters encoding 256 bits from the browser's CSPRNG — the usual shape for password salts, HMAC secrets, session keys and signing secrets, in an alphabet that is safe to paste into any config or shell.

The full tool also generates UUID v4, UUID v7 and Base64 tokens, exports to .env, JSON and YAML, and decodes UUID v7 timestamps — all locally in your browser, with no server involved.

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Executed in Browser

Your files and inputs never leave this device. Processing runs completely offline. 100% Secure.

Accepted Formats & Rules

  • Bulk generation of UUIDv4, UUIDv7, Hex salts, and Base64 tokens.
  • Timestamp decoder for UUIDv7 identifiers.
  • Environment and configuration syntax builders.

Key Benefits

✓ UUIDv7 Date-Time Decoder: Extract precise millisecond creation timestamps from UUIDv7.
✓ Format Exporter: Exports generated keys formatted as .env files, JSON configs, or YAML lists.
✓ Uniform Entropy: Utilizes browser CSPRNG for high-entropy secure values.

Use Cases

  • • Do you want to generate cryptographically secure salts, API keys, and secret tokens in bulk?
  • • Need to decode a UUIDv7 string and extract the embedded millisecond generation timestamp?
  • • Want to generated secret keys formatted as .env files, JSON configurations, or YAML lists?