bcrypt Hash Generator & Verifier
This bcrypt generator computes a bcrypt hash of any text with an adjustable cost factor, and verifies a plaintext value against an existing bcrypt hash to confirm a match. The cost factor controls how many rounds of key-stretching are applied, letting you trade hashing speed for resistance to brute force. Everything runs locally in your browser — the text and hashes you work with are never transmitted anywhere.
Generate Hash
Generate a bcrypt hash from your text. Higher rounds provide better security but take longer to process.
Good security — recommended default
Verify Hash
Check if a bcrypt hash matches the original text.
Frequently asked questions
Why is bcrypt slower than MD5 or SHA-256, and why is that good for passwords?
Bcrypt is deliberately slow, and its cost factor lets you tune exactly how slow, which makes brute-forcing a stolen password hash far more expensive; MD5 and SHA-256 are designed to be fast, which is exactly the wrong property for hashing passwords.
What cost factor should I use for bcrypt?
10 is a solid default for most applications; raise it to 12-14 for stronger resistance to brute-force at the cost of slower hashing, and only drop below 10 for local testing, never in production.
Do I need to store the salt separately from the bcrypt hash?
No — bcrypt embeds the salt directly inside the hash string it outputs, in a format like "$2b$10$...", so that single string is everything you need to store and later verify against.
Is it safe to hash real passwords with this tool?
Yes — hashing and verification both run entirely in your browser, so no password or hash you enter is ever sent to a server, though production systems should still hash passwords server-side at signup rather than relying on a client-side tool.
Is bcrypt better than SHA-256 for storing passwords?
Yes, for password storage specifically — SHA-256 is a fast general-purpose hash meant for integrity checks, while bcrypt is purpose-built for passwords with built-in salting and a tunable work factor that resists GPU-accelerated brute-force attacks far better than a fast hash ever could.
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