Bcrypt Generator & Verifier

Generate secure bcrypt hashes for passwords or verify text against existing hashes.

Generate Hash

Higher = Slower/More secure

Verify Hash

What is Bcrypt?

Bcrypt is a widely-used password hashing function designed to be computationally expensive and slow. Unlike standard cryptographic hashes (like SHA-256) which are designed for speed, bcrypt is intentionally slow to deter brute-force and dictionary attacks.

It automatically handles the generation of a cryptographic salt (a random string added to the password before hashing) to defend against rainbow table attacks.

Understanding Salt Rounds

The "cost factor" or "salt rounds" determines the computational time required to calculate a single bcrypt hash. Because computing power increases over time, the cost factor can be increased to ensure that hashing a password remains appropriately slow.

  • Each increase in the round count doubles the time it takes to compute the hash.
  • A typical default is 10 or 12 rounds, providing a good balance between security and user experience.
  • Setting the rounds too high (e.g., 15+) can cause significant delays during user login and may be vulnerable to Denial of Service (DoS) attacks if an attacker requests many hashes concurrently.

Is this safe?

Privacy Guarantee: This tool utilizes the bcryptjs library running entirely within your browser environment. Your passwords are never sent over the network, ensuring complete privacy. However, for extreme security-critical systems, always generate passwords and hashes securely offline.