Bcrypt Hash Generator
Generate salted bcrypt password hashes with configurable cost rounds for development and testing.
Run tool
This online Bcrypt Hash Generator creates salted password hashes for security testing, mock datasets, and authentication configuration. When you enter a text string into the password field, the tool converts the input using UTF-8 and applies the standard bcrypt hashing algorithm with an automatically generated salt. You can also specify an optional cost rounds parameter, which defaults to 12 and operates within the supported range of 10 through 15 rounds. Each computation with a non-empty string produces a distinct hash because the generator issues a fresh salt on every run. If you leave the password input blank, the generator returns empty values for both the salt and the resulting hash. The resulting hash output conforms to standard format specifications, allowing engineers to verify it against standard authentication libraries in modern frameworks. Adjust the cost parameter to balance hashing workload and resource consumption according to your project requirements.
Instructions
- Enter your plain text string into the Password field, or leave it blank if generating an empty placeholder.
- Specify the Cost rounds number between 10 and 15, or keep the default value of 12.
- Click Run to compute the hash.
- Copy the generated bcrypt hash string and salt value from the output display for your development or configuration files.
Examples
- Hashing the string 'MySecurePass123' with cost rounds set to 12 generates a standard bcrypt hash string.
- Leaving the password field empty produces an empty hash and salt value in the result panel.
- Setting the cost rounds to 10 for a password string speeds up computation while producing a valid bcrypt hash format.
FAQ
Why does the hash change each time I submit the same password?
Bcrypt creates a unique cryptographic salt for every run. Because a new salt is generated each time, the resulting hash string differs even when using the exact same password and cost rounds.
What cost rounds range is supported?
The generator accepts cost rounds ranging from 10 through 15. If a value outside this range is entered, the tool constrains it to the 10 to 15 boundary.
Can I hash an empty string?
Yes. If the password field is left blank, the tool completes the run and produces empty salt and hash output fields.
How do I verify the generated hash in an application?
You can verify the hash using standard bcrypt verification functions available in backend libraries, comparing the plain text password against the generated hash string.