Bcrypt Generator

Password or Text

Strength

Enter a password Very Weak Weak Fair Strong Very Strong

Salt Rounds

2 2^{n} iterations

Approx.

Bcrypt Hash Hashed in

Text to Verify

Bcrypt Hash

Paste a hash from the history or type one manually.

Match! No Match

The hash matches your input.

Verified in

Recent Hashes

What is bcrypt?

Bcrypt is an adaptive hashing algorithm designed for passwords. Its "cost factor" deliberately slows down brute-force attacks — making stolen hashes exponentially harder to crack.

Industry Standard

Bcrypt has been the gold standard for password hashing since 1999. It is used by frameworks like Django, Laravel, Rails, and Spring Security, and is recommended by OWASP.

100% Browser-Based

All hashing runs entirely in your browser using bcryptjs. No data is transmitted to our servers — your passwords never leave your device.

Frequently Asked Questions

Everything you need to know about bcrypt and password hashing

Bcrypt is a password hashing function designed by Niels Provos and David Mazières in 1999. Unlike MD5 or SHA, bcrypt is intentionally slow and computationally expensive, making brute-force attacks impractical. It also incorporates a salt automatically, preventing rainbow table attacks. OWASP recommends bcrypt as one of the top choices for password storage.

The cost factor (salt rounds) determines how many times bcrypt iterates its key setup — specifically 2^N iterations. A cost of 12 means 4,096 rounds. Increasing the cost by 1 doubles the computation time. The recommended default is 12 for most applications; higher values (13–14) are appropriate for high-security scenarios where you can afford longer response times.

No. Bcrypt is a one-way hashing function — it cannot be reversed or decrypted. The only way to check if a password matches a hash is to run the same bcrypt algorithm on the input and compare the result. This is exactly what the "Verify" tab of this tool does.

That is by design. MD5 and SHA are designed to be fast — which makes them terrible for passwords (billions of hashes per second on modern GPUs). Bcrypt's deliberate slowness means an attacker who steals your database would need years to brute-force even common passwords. At a cost factor of 12, each guess takes ~400ms on modern hardware.

Yes. This tool uses bcryptjs, a pure JavaScript implementation that runs entirely in your browser. Nothing is sent to our servers. However, for production systems, we still recommend using bcrypt through your server-side framework (Node.js, PHP, Python, etc.) rather than client-side JavaScript.

Hash passwords securely with bcrypt

The bcrypt generator turns a password into a bcrypt hash – the industry standard for storing credentials securely. Unlike fast hashes such as MD5 or SHA-256, bcrypt is deliberately compute-intensive and includes a built-in salt, which makes brute-force and rainbow-table attacks far harder. The tool is aimed at developers building login systems or checking existing hashes, and it runs entirely in your browser.

Common use cases

Store passwords: Create the hash that goes into your database instead of the plaintext password, secure and individually salted.
Verify hashes: Check whether a password matches an existing bcrypt hash, for example when debugging a login.
Tune the cost factor: Try different cost values to find the right balance between security and server load.
Seeds and test data: Create reproducible hashes for demo or test users without writing a backend script.

How to create a bcrypt hash

1 Enter the password you want to hash into the input field.
2 Choose the cost factor (work factor) – higher means more secure but slower.
3 Generate the bcrypt hash and copy it into your database or code.
4 To verify, paste a password and an existing hash and see whether they match.

Why bcrypt?

bcrypt was designed to be slow on purpose: the cost factor lets you raise the computational effort so that hashes stay hard to crack even with future hardware. The built-in salt ensures that identical passwords never produce the same hash. Choose the cost factor as high as your server performance allows – values around 10 to 12 are a good starting point. For plain file-integrity checks, on the other hand, a fast SHA hash is the better fit.

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