Bcrypt Generator

Generate secure password hashes using Web Crypto API with bcrypt-like functionality

Generate Bcrypt Hash

Password to Hash:

Cost Factor (Rounds): 12

4 (Fast) 10 (Default) 15 (Slow)

Higher values = more secure but slower

Generated Hash:

Verify Password

Password to Verify:

Bcrypt Hash:

Understanding Bcrypt

What is Bcrypt?

Bcrypt is a password hashing function designed to be slow and computationally expensive, making it resistant to brute-force attacks.

It uses a salt to prevent rainbow table attacks and has an adjustable cost parameter to scale with computing power.

Hash Format

$2a$12$saltAndHash
│││└─ Hash (31 chars)
││└─ Salt (22 chars)
│└─ Cost (work factor)
└─ Algorithm version

Cost Factor Guide

Cost 4: ~0.0015s (Too Fast)

Cost 8: ~0.025s (Fast)

Cost 10: ~0.1s (Recommended)

Cost 12: ~0.4s (Good)

Cost 15: ~3.2s (Very Secure)

Recommendation: Use cost 12 for most applications. Increase if your server can handle longer hash times.

Batch Operations

Batch Hash Generation

Passwords (one per line):

Batch Cost:

Generated Hashes

Batch results will appear here...

Implementation Examples

PHP Implementation

// Hash a password
$password = 'user_password';
$hash = password_hash($password, PASSWORD_BCRYPT, [
    'cost' => 12
]);

// Verify a password
$is_valid = password_verify($password, $hash);

if ($is_valid) {
    echo "Password is correct!";
} else {
    echo "Invalid password!";
}

Node.js Implementation

const bcrypt = require('bcrypt');

// Hash a password
const password = 'user_password';
const saltRounds = 12;

bcrypt.hash(password, saltRounds, (err, hash) => {
    // Store hash in database
});

// Verify a password
bcrypt.compare(password, hash, (err, result) => {
    if (result) {
        console.log("Password is correct!");
    } else {
        console.log("Invalid password!");
    }
});

Security Features

🔐 Adjustable cost factor for future-proofing
🧂 Built-in salt generation prevents rainbow tables
⏱️ Intentionally slow to resist brute-force attacks
🔄 Each hash is unique even for the same password
📊 Real-time hash verification
📦 Batch processing for multiple passwords

Best Practices

✅ Never store plain text passwords
✅ Use cost factor 10-12 for most applications
✅ Always verify passwords using bcrypt compare
✅ Consider server performance when choosing cost
✅ Increase cost factor as hardware improves
✅ Use HTTPS when transmitting passwords