Bcrypt Hash Generator Online — Free, No Server, No Logs

What Is Bcrypt?

Bcrypt is a password hashing function designed by Niels Provos and David Mazières in 1999, based on the Blowfish cipher. Unlike general-purpose hash functions (MD5, SHA-256), bcrypt is specifically designed to be slow and computationally expensive — and that slowness is intentional. It makes brute-force attacks impractical even with modern hardware.

How Salt Rounds Work

The cost factor (salt rounds) controls how many times the hashing algorithm iterates. Each increment doubles the computation time: 10 rounds takes roughly twice as long as 9. This means as hardware gets faster, you can simply increase the cost factor to keep bcrypt computationally expensive. A value of 10–12 is recommended for production use — high enough to be secure, low enough to be usable under real traffic load.

Why Bcrypt Is Better Than MD5/SHA for Passwords

• Adaptive cost — You can increase rounds as hardware improves, without changing your application code.
• Built-in salting — Bcrypt automatically generates and embeds a random salt in the hash output, preventing rainbow table attacks.
• Designed to be slow — MD5 and SHA-256 are designed for speed (file checksums, digital signatures). That speed makes them terrible for password storage — billions of attempts per second are possible.

Bcrypt in Laravel

Laravel's Hash::make('password') uses bcrypt by default (configurable in config/hashing.php). The default rounds are 12. You can verify a hash with Hash::check('password', $hash).

Why Hash Locally?

This tool runs entirely in your browser using bcrypt.js — a pure JavaScript bcrypt implementation. No password ever reaches our servers. If you're testing with real credentials, a local browser-based tool is far safer than any server-backed alternative. That said, you should never test with actual production passwords — use placeholder values for development and testing.