Online Tool Store
Bcrypt Hash Generator
Generate a bcrypt password hash with an adjustable cost factor, and verify a password against an existing hash, entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Higher is slower to compute but more resistant to brute-force attacks. 10-12 is a common default.
Verify a password against a hash
How the bcrypt hash generator works
- Enter a password and choose a cost factor.
- Click Generate hash — a random salt is created and the password is hashed with it, producing a standard bcrypt hash string.
- Use the verify section to check whether a given password matches an existing bcrypt hash.
Why bcrypt is designed to be slow
Unlike a fast general-purpose hash (like SHA-256), bcrypt is deliberately computationally expensive, and that cost is tunable via the rounds parameter. That slowness is the whole point — it makes brute-forcing large numbers of password guesses against a stolen hash database dramatically more expensive for an attacker, while still being fast enough for a single legitimate login check.
FAQ
Why does every hash look different for the same password?
Bcrypt automatically generates a random salt each time you hash a password, and that salt is embedded in the resulting hash — so hashing the same password twice produces two different-looking hashes, both of which will still correctly verify against that same password.
What does the cost factor (rounds) control?
It controls how many times bcrypt's internal algorithm repeats — higher values make hashing (and cracking attempts) exponentially slower. 10-12 is a common default balance between security and performance for interactive use; higher values may take noticeably longer to compute.
Should I use this for a real production login system?
This tool is meant for testing, learning, and one-off hash generation — for a real application, hash passwords server-side using a well-maintained bcrypt library in your backend language, not in a visitor's browser.
Is my password sent anywhere?
No. Hashing and verification both run entirely in your browser using a JavaScript bcrypt implementation — nothing is sent to Online Tool Store or any other server.
How we compare
| Feature | Online Tool Store | bcrypt-generator.com | Node.js bcrypt CLI |
|---|---|---|---|
| Built-in verify against a hash | ✓ | ✓ | Separate script needed |
| Your password never leaves your device | ✓ | Not stated | ✓ |
| No install required | ✓ | ✓ | Requires Node.js |
For a quick bcrypt hash and verify without installing Node.js or trusting a password to an unknown server, the Online Tool Store Bcrypt Hash Generator runs entirely on your device.