🔒Bcrypt Hash Generator

Generate and verify bcrypt password hashes with configurable rounds.

Bcrypt requires a native library. This tool uses SHA-256 with salt (browser-compatible) as an alternative.

Password

Salt (optional — leave blank to auto-generate)

About Bcrypt Hash Generator

Bcrypt Hash Generator creates bcrypt-hashed passwords with a configurable work factor (cost rounds), and verifies whether a plaintext password matches a given bcrypt hash. Bcrypt is the industry-recommended algorithm for hashing user passwords due to its built-in salting and adjustable slowness.

How to Use Bcrypt Hash Generator

1
Enter the password to hash
Type the password you want to hash into the input field.
2
Set the cost factor
Choose a cost factor (default 10). Higher values are more secure but slower to compute — 10–12 is appropriate for most web applications.
3
Generate or verify the hash
Click 'Hash' to generate a new bcrypt hash, or paste an existing bcrypt hash in the verify section to check a password against it.

Common Use Cases

Generating bcrypt password hashes for seeding test databases
Verifying that a password matches a stored bcrypt hash during development
Learning how bcrypt salting and work factors affect hash output
Testing bcrypt cost factor performance on your server hardware

Frequently Asked Questions

Why use bcrypt instead of SHA-256 for password storage?

SHA-256 is designed to be fast, making it vulnerable to brute-force and GPU-based attacks when used for passwords. Bcrypt is intentionally slow, and its adjustable cost factor lets you increase the work required as hardware gets faster.

What is the bcrypt cost factor (rounds)?

The cost factor determines how computationally expensive the hash is. A value of 10 (the default) is recommended for most applications. Increasing to 12 or 14 adds more protection but slows down authentication proportionally.

Can I verify a password against an existing bcrypt hash?

Yes — paste a bcrypt hash and the plaintext password into the verify section and click 'Verify' to check whether they match, without needing to re-hash.

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