Bcrypt Generator

Generate a bcrypt hash from text, or check whether text matches an existing bcrypt hash — entirely in your browser, nothing sent to a server.

Mode

Text to hash

Salt rounds (cost factor)

Runs entirely in your browser — nothing is sent to a server. Higher salt rounds are slower but more resistant to brute-force attacks; 10-12 is the typical production default.

How was this tool?

Your feedback helps us improve Bcrypt Generator.

Why use Bcrypt Generator?

Bcrypt remains a standard choice for password hashing because its cost factor is deliberately tunable — as hardware gets faster, you can increase the salt rounds to keep brute-force attacks proportionally expensive, something a fast, fixed-cost hash function like SHA-256 can't offer for this specific purpose. This tool runs the well-established bcryptjs library directly in your browser for both directions: generating a fresh hash from text (useful for seeding test data or understanding how rounds affect the output) and comparing text against an existing hash (useful for debugging authentication issues) — with nothing ever transmitted to a server.

Key benefits

Runs entirely in your browser — text never sent to a server
Adjustable salt rounds (cost factor)
Both generate and compare modes
Free, unlimited use

Features

Standard bcrypt hashing via the well-established bcryptjs library
Configurable salt rounds (4-14)
Hash comparison mode

Popular use cases

Generating a bcrypt hash for a database seed script or test fixture
Checking whether a plaintext password matches a stored bcrypt hash during debugging
Learning how bcrypt salt rounds affect hashing
Quick bcrypt reference without spinning up a script

How to use Bcrypt Generator

1
Pick a mode
Generate a new hash, or compare text to an existing one.
2
Enter your text
And salt rounds, if generating.
3
Get the result
The hash, or a match/no-match result.

Frequently asked questions

What are salt rounds and why do they matter?

Salt rounds (the cost factor) control how computationally expensive the hash is to compute — higher rounds mean slower hashing, which is intentional: it makes brute-force password-cracking attempts proportionally slower too. 10-12 is the typical production default as of 2026, balancing security against login-time performance.

Is it safe to generate password hashes in a browser tool?

Hashing runs entirely client-side using the bcryptjs library — nothing is transmitted anywhere. That said, avoid pasting real production passwords into any browser tool as a general security habit; use test values when possible.

Why does the same text produce a different hash each time?

Bcrypt generates a random salt for every hash by design, so hashing the same text twice produces two different-looking hashes — both are still valid and will correctly verify against that same text using bcrypt's compare function.

Last reviewed: September 2026

How was this tool?

Related tools