Note: This is a demonstration tool. For production use, always hash passwords server-side using proper bcrypt libraries.
Bcrypt uses a cost factor (rounds) - higher values are more secure but slower. Recommended: 10-12 rounds.
Secure Password Hashing Tool
Create secure bcrypt password hashes with configurable cost factors for authentication systems. Bcrypt is the industry-standard password hashing algorithm used by major platforms for secure password storage.
Our tool also verifies bcrypt hashes against plain text passwords. All hashing happens in your browser using JavaScript - your passwords never leave your device.
Note: This is a demonstration tool. For production use, always hash passwords server-side using proper bcrypt libraries.
Bcrypt uses a cost factor (rounds) - higher values are more secure but slower. Recommended: 10-12 rounds.
A bcrypt generator is a password hashing tool that uses the bcrypt algorithm to create secure, one-way hashes of passwords for safe storage in databases. Bcrypt is a cryptographic hash function specifically designed for password hashing, incorporating a configurable cost factor (work factor) that makes it computationally expensive to crack. Unlike fast hash functions like MD5 or SHA-1 that can be cracked quickly, bcrypt is intentionally slow, taking 100-1000 milliseconds to hash a password, making brute force attacks impractical. Our generator automatically generates random salts (unique random data added to each password before hashing), supports cost factors from 4-12 (higher = more secure but slower), and produces bcrypt hashes in the standard format compatible with all major programming languages and frameworks.
Storing passwords in plain text is catastrophically insecure - database breaches expose all user passwords instantly. Even simple hashing (MD5, SHA-1) is insufficient because attackers use rainbow tables and GPU-accelerated cracking to break billions of hashes per second. Bcrypt solves this with adaptive hashing that's slow by design - each hash takes 100-1000ms, limiting attackers to thousands of attempts per second instead of billions. Bcrypt automatically generates unique salts for each password, preventing rainbow table attacks. The configurable cost factor means you can increase security over time as computers get faster. Major frameworks (Django, Laravel, Ruby on Rails, Spring Security) use bcrypt by default. Companies like Facebook, Twitter, and GitHub use bcrypt to protect user passwords.
Input: Password: MySecurePass123!, Cost: 10
Output: $2b$10$N9qo8uLOickgx2ZMRZoMye.IjefVqrEne3KpTbJZSXM4YUiGzxC5e
Use Case: Perfect for user registration systems. Store this hash in your database instead of the plain password. Takes ~100ms to generate, making brute force attacks impractical.
Input: Password: AdminP@ssw0rd2024, Cost: 12
Output: $2b$12$EXRkfkdmXn2gzds2SSitu.MW9.gAVqa9eLS1//RYtYCi.oC66OFmW
Use Case: Ideal for admin accounts requiring extra security. Cost factor 12 takes ~400ms per hash, providing maximum protection against brute force attacks.
Input: Token: api_key_abc123xyz789, Cost: 10
Output: $2b$10$vI8aWBnW3fID.ZQ4/zo1G.q1lRps.9cGLcZEiGDMVr5yUP1KUOYTa
Use Case: Essential for API key storage. Hash API keys before storing in database to prevent exposure if database is compromised.
Bcrypt is a password hashing function based on the Blowfish cipher. It combines your password with a random salt, then applies the Blowfish cipher multiple times (2^cost iterations). This makes it computationally expensive to crack - a cost factor of 10 means 1,024 iterations, taking ~100ms per hash.
Use cost factor 10-12 for most applications. Cost 10 (~100ms) balances security and performance. Cost 12 (~400ms) provides maximum security for sensitive accounts. Avoid cost factors below 10 (too fast to crack) or above 14 (too slow for users). Test on your server hardware.
MD5 and SHA are designed to be fast, allowing attackers to test billions of passwords per second using GPUs. Bcrypt is intentionally slow (100-1000ms per hash), limiting attackers to thousands of attempts per second. Bcrypt also includes automatic salt generation, preventing rainbow table attacks.
A salt is random data added to passwords before hashing. It ensures identical passwords produce different hashes, preventing rainbow table attacks. Bcrypt automatically generates a unique 128-bit salt for each password and includes it in the hash output, so you don't need to store salts separately.
No! Bcrypt is a one-way hash function - it's mathematically impossible to reverse. To verify passwords, you hash the input password with the same salt and compare hashes. This is why password reset (not recovery) is necessary when users forget passwords.
Use bcrypt.compare(plainPassword, hashedPassword) in your application. This function extracts the salt from the stored hash, hashes the input password with that salt, and compares results. Never compare hashes directly - always use the bcrypt compare function.
Yes! Bcrypt remains one of the most secure password hashing algorithms. While newer algorithms like Argon2 exist, bcrypt is battle-tested, widely supported, and still recommended by security experts. The configurable cost factor allows increasing security as computers get faster.
$2a$ is the original bcrypt format. $2b$ fixes a rare bug in the original. $2y$ is PHP-specific. All are compatible and secure. Modern implementations use $2b$. The prefix doesn't affect security - the cost factor and salt are what matter.
Yes! When users log in, check if their hash uses an old cost factor. If so, rehash their password with the new cost factor and update the database. This allows gradually increasing security without forcing password resets.
Yes, hash API keys and tokens before storing in databases. If your database is compromised, attackers can't use the hashed keys. However, for session tokens that need frequent verification, consider faster alternatives like HMAC-SHA256 with proper key management.
Get $200 free DigitalOcean credit or sponsor us on GitHub!