Hexadecimal Tool

Hex Secret Generator

Generate cryptographically secure hexadecimal secrets with customizable formatting. Perfect for keys, tokens, and identifiers.

Hex Secret

32 bytes → 64 hex characters (Lowercase)

256 bits

Configuration

Byte Length32 bytes

8 bytes64 bytes128 bytes

Output: 64 hex characters

Format Options

0x Prefix

Add "0x" prefix (Not added)

Byte Grouping

Common Sizes

Where Hex Secrets Shine

Command-Line tooling

Many CLIs and SDKs expect lowercase hex buffers. Copy/paste to OpenSSL, cURL, or Terraform variables.

Firmware & IoT

Embed deterministic lengths directly into configuration headers without worrying about URL encoding.

Hash Debugging

Hex aligns with SHA/HMAC outputs—great for verifying signature mismatch issues.

Resource Hub

All Secret Key Tools

Switch formats instantly—Base64, Base64URL, JWT, HMAC, webhook, and more.

Guides & Tutorials

See how to store hex secrets inside `.env` files, Kubernetes secrets, or secret managers.

Base64 vs Hex

Decide whether a project should expose raw bytes, Base64URL, or hex strings.

Privacy & Security

All hexadecimal secrets are generated locally in your browser using the Web Crypto API. No data is sent to our servers. Your secrets are never stored, logged, or transmitted.