Bcrypt Hash Generator - Bcrypt Encrypt

Bcrypt Hash Generator - Secure Password Hashing Online

A powerful online bcrypt hash generator and password verification tool. Generate secure bcrypt hashes for password storage with customizable salt rounds, or verify passwords against existing bcrypt hashes. Industry-standard password hashing algorithm designed to be slow and resistant to brute-force attacks. Perfect for developers building secure authentication systems.

What is bcrypt?

Bcrypt is a password hashing function designed specifically for secure password storage. Unlike fast hash functions (MD5, SHA), bcrypt is intentionally slow to protect against brute-force attacks.

Key features:
- Adaptive cost (configurable rounds)
- Built-in salt generation
- Slow by design (protection)
- Industry standard since 1999

Bcrypt hash format: $2a$10$N9qo8uLOickgx2ZMRZoMye0IQlH9JpwQqug7rdIvxIWJUIo9SxMOK
- $2a$ = bcrypt version
- 10 = cost factor (2^10 rounds)
- Next 22 chars = salt
- Remaining = password hash

How do I generate a bcrypt hash?

1. Select 'Generate Hash' mode
2. Enter your password
3. Choose salt rounds (10 recommended)
4. Click 'Generate Hash'
5. Copy the bcrypt hash

Example:
Password: "mySecurePassword123"
Salt Rounds: 10
Hash: $2a$10$abcdefghijklmnopqrstuvwxyz...

The hash includes the salt automatically, so you only need to store this one string.

How do I verify a password?

1. Select 'Verify Password' mode
2. Enter the password to check
3. Paste the bcrypt hash
4. Click 'Verify Password'
5. See if it matches (✓) or not (✗)

Example:
Password: "myPassword"
Hash: $2a$10$N9qo8uLOickgx2ZMRZoMye...
Result: ✓ Password Matches!

Bcrypt automatically extracts the salt from the hash during verification.

What are salt rounds?

Salt rounds (cost factor) determine how many iterations bcrypt performs. Higher rounds = more secure but slower.

Rounds → Iterations → Time:
- 8 rounds = 2^8 = 256 iterations (~100ms)
- 10 rounds = 2^10 = 1,024 iterations (~250ms)
- 12 rounds = 2^12 = 4,096 iterations (~1 sec)
- 14 rounds = 2^14 = 16,384 iterations (~4 sec)

Recommendations:
- Testing: 8 rounds (fast)
- Production: 10-12 rounds (secure)
- High security: 12-14 rounds (very slow)

Choose based on your server's capability and security needs.

Is bcrypt secure for passwords?

YES! Bcrypt is one of the most secure password hashing algorithms.

Why bcrypt is secure:
✓ Slow by design (resists brute force)
✓ Built-in salt (prevents rainbow tables)
✓ Adaptive cost (future-proof)
✓ Battle-tested (25+ years)
✓ Industry standard

Bcrypt vs Others:
- MD5/SHA: ✗ Too fast, easily cracked
- bcrypt: ✓ Slow, secure
- Argon2: ✓ More modern, also good
- PBKDF2: ✓ Acceptable alternative

For password storage, always use:
✓ bcrypt (recommended)
✓ Argon2 (modern)
✓ scrypt (good)
✗ Never MD5, SHA-1, or plain SHA-256

Can I use the same salt rounds for all users?

YES! The salt rounds (cost factor) can be the same for all users.

How bcrypt works:
- Cost factor: Same for all (e.g., 10)
- Salt: Unique per password (auto-generated)
- Each password gets unique salt automatically
- Salt is stored in the hash itself

Example:
User 1: password="hello" → $2a$10$SALT1...
User 2: password="hello" → $2a$10$SALT2... (different!)

The cost factor is a system-wide setting, but each hash is still unique due to the random salt.

How long does bcrypt hashing take?

Time depends on salt rounds:

- 8 rounds: ~100-200ms
- 10 rounds: ~200-400ms
- 12 rounds: ~800-1600ms
- 14 rounds: ~3-6 seconds

This is intentional! The slowness protects against attacks:
- Attacker trying 1 billion passwords:
* MD5: Few seconds
* bcrypt (10): 11,574 days

Note: Client-side (this tool) is slower than server-side due to JavaScript. Production bcrypt should run on the server for best performance and security.

Should I use this tool in production?

NO! This tool is for learning and testing only.

For production:
✗ Don't hash passwords client-side
✗ Don't use JavaScript bcrypt for real auth
✓ Hash passwords on the server
✓ Use server-side bcrypt libraries
✓ Never send plain passwords over HTTP

Server-side bcrypt libraries:
- Node.js: bcrypt, bcryptjs
- Python: bcrypt, passlib
- PHP: password_hash() (built-in)
- Java: jBCrypt, Spring Security
- Ruby: bcrypt gem
- Go: golang.org/x/crypto/bcrypt

This tool is great for:
✓ Learning how bcrypt works
✓ Testing bcrypt hashes
✓ Verifying hash formats
✓ Development and debugging
✗ NOT for production authentication

Key Features

• Generate secure bcrypt hashes from passwords
• Verify passwords against bcrypt hashes
• Customizable salt rounds (8, 10, 12, 14)
• Automatic salt generation
• Password match verification with visual feedback
• Copy hash to clipboard
• Download hash as text file
• Hash information display (algorithm, cost factor, length)
• Dark mode support
• 100% client-side processing
• Works offline after initial load
• Mobile-friendly responsive design
• Educational tool for learning password security
• No registration required