Bcrypt Generator
Generate bcrypt password hashes with configurable salt rounds. Verify existing hashes against plaintext.
Generate Hash
Higher rounds = more secure but slower. 10-12 is recommended.
Verify Hash
What is a Bcrypt Hash Generator?
Bcrypt is a password hashing function designed for secure password storage. This tool generates bcrypt hashes from any plaintext string and lets you verify that a plaintext matches a given hash. All hashing and verification happens locally in your browser using bcryptjs. No passwords are ever transmitted to a server.
Understanding Salt Rounds
Salt rounds (work factor) control how computationally expensive the hash generation is. Higher rounds = stronger security but slower generation time.
| Salt Rounds | Security Level | Use Case |
|---|---|---|
| 4–6 | Low (fast) | Testing only, not for production |
| 10–12 | Recommended | Production applications (OWASP standard) |
| 14-16 | Very High | High-security systems, slower UI |
Common Use Cases
- Generate password hashes for storing in a database
- Test bcrypt verification logic by comparing plaintext against known hashes
- Verify existing bcrypt hashes in a database against user-provided credentials
- Understand the relationship between salt rounds and hash generation time
- Create hashed test data for unit and integration tests
Frequently Asked Questions
1. Why does the same password produce a different hash each time?
Bcrypt uses a random salt that is embedded in the hash. This means the same password will produce a different hash every time, but the salt stored in the hash is used to verify the match.
2. Can bcrypt hashes be decrypted to get the original password?
No. Bcrypt is a one-way function. There is no way to "decrypt" a hash back to the plaintext. This is why it's safe for password storage.
3. What library does this tool use?
This tool uses bcryptjs, a pure-JavaScript implementation of the bcrypt algorithm, loaded in your browser. No data is ever sent to a server.