bcrypt hash generator

Generates bcrypt hashes from input strings using configurable cost factors for developers and security engineers to test hashing strategies.

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About This Tool

This tool accepts plaintext input and a selectable cost factor to produce a bcrypt hash, enabling quick evaluation of hashing parameters for secure credential storage.
Conceptually, bcrypt uses a salt and a computational cost to expand the input and perform many rounds, yielding a hash string that encodes version, cost, salt, and hash. The tool mirrors this process so users can experiment with different salts and costs while observing resulting hashes in a controlled environment.
Beneficiaries include developers, security engineers, and QA teams who need deterministic, reproducible results for testing and auditing credential handling. Unique value lies in immediate, parameterized hashing with clear outputs (hash, salt, cost) and options for fixed or random salts. Core features encompass input validation, a sensible default cost (12), optional salt handling, and standard bcrypt formatting for easy verification in downstream systems.
Use cases span testing password-hashing strategies, profiling performance at various cost factors, and validating integration points where bcrypt hashes are stored or compared.

How to Use

  1. Provide inputs: plaintext, cost factor, optional salt
  2. Choose salt handling: fixed salt or generate random salt
  3. Run calculation
  4. Retrieve outputs: hash, salt, cost
  5. Validate hash against expected values
How to use bcrypt online generator

Frequently Asked Questions

Find Quick Answers

What is bcrypt?
Bcrypt is a password hashing function designed to resist brute-force attacks by using a salt and a computational cost. It produces a string encoding the algorithm version, cost factor, salt, and the resulting hash, enabling secure verification without storing the raw password.
What is cost factor?
Cost factor (log rounds) defines the number of hashing iterations. Higher costs increase computation time, improving security against attackers but requiring more server resources. The tool supports 4–31 with a default of 12 for balance.
Is salt included in the hash?
Yes. The bcrypt output embeds the salt within the hash string, enabling verification without separate salt storage. Providing a fixed salt yields a hash that exactly reflects that salt.
Can I verify a hash using this tool?
Yes. To verify, reproduce the hash by hashing the same plaintext with the same salt and cost factor. If the resulting hash matches the stored one, the verification is successful.

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