--- title: "Secret Key Hex Generator - TechVoyage" canonical_url: "https://techvoyage.dev/tools/secret-key-hex" last_updated: "2026-10-20T09:53:50.431Z" meta: description: "Generate a cryptographically secure secret key as hex bytes in the browser. Equivalent to openssl rand -hex N." "og:description": "Generate a cryptographically secure secret key as hex bytes in the browser. Equivalent to openssl rand -hex N." "og:title": "Secret Key Hex Generator - TechVoyage" --- # **Secret Key Hex Generator** Generate a cryptographically secure secret key as hex bytes in the browser. Equivalent to openssl rand -hex N. **Bytes** Generated client-side using the browser's Web Crypto API. Equivalent to openssl rand -hex N. ## **About this tool** This tool generates cryptographically secure random bytes with your browser's Web Crypto API and encodes them as a lowercase hex string — the browser equivalent of the openssl rand -hex command. Use it for secret keys, tokens, and API credentials. Everything runs locally in your browser. ## **FAQ**
**Is this the same as openssl rand -hex 32?**
Yes. With 32 bytes you get a 64-character lowercase hex string from a cryptographically secure random source, exactly like openssl rand -hex 32.
**Is the generated key sent to a server?**
No. The key is generated locally in your browser with crypto.getRandomValues. Nothing is transmitted or stored.
**How many bytes should I use?**
32 bytes (256 bits) is a common default for secret keys. Use 16 bytes for 128-bit tokens.