Free Bcrypt Hash Generator
Storing passwords? Hash them with bcrypt — the battle-tested, salted, deliberately slow algorithm behind millions of logins. The Bcrypt Hash Generator creates production-ready bcrypt hashes with an adjustable cost factor (4–14), and includes a verifier to check passwords against existing hashes. Everything runs locally, so test credentials never cross the network.
Higher cost = slower to compute = harder to brute-force. Cost 10 is the standard default.
Verify a password
How to Use the Bcrypt Hash Generator
- Type the password and pick a cost factor (10 is standard).
- Click Generate bcrypt hash — hashing takes a moment by design.
- Copy the hash and store it in your database (never store plain passwords).
- Use Verify a password to check a password against an existing hash.
Features
Bcrypt hashing with cost 4–14; automatic secure salt; hash-then-verify workflow; password verification tool; copy button.
Benefits & Use Cases
Generate hashes for seed users, test login code, verify migrated hashes, or learn how cost factors affect hashing time.
Tips
Use cost 10+ in production; higher costs slow attackers but also your server — benchmark. Never cap password length before hashing (bcrypt truncates at 72 bytes; pre-hash long passwords if needed).
Frequently Asked Questions
What is bcrypt?
Bcrypt is a password-hashing function designed to be slow and salted. Slowness defeats brute force; unique salts defeat rainbow tables. It has been the default recommendation for password storage for over two decades.
What cost factor should I use?
10 is the standard default. 12 for higher security if your server handles it. The right value is the highest your login flow tolerates — aim for roughly 250ms per hash.
Why does hashing take a moment?
That is the point. Bcrypt is intentionally expensive — a fraction of a second for you, but billions of wasted operations for an attacker guessing passwords.
Can I verify an existing hash?
Yes — paste the hash and the candidate password into the verifier. It uses constant-time comparison and tells you whether they match.
Is it safe to hash real passwords here?
The page never uploads anything, but as a rule, production password handling belongs on your server. Use this tool for testing, learning, and generating seed credentials.
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