Bcrypt Password Hash Generator & Verifier

Generate bcrypt password hashes with adjustable cost factor (salt rounds 4–16) and verify plaintext passwords against existing bcrypt hashes. The industry-standard password hashing algorithm used by Node.js, Python, Ruby, and PHP frameworks. All hashing runs in your browser.

Bcrypt Generator: Enter a password and select a cost factor (10–12 recommended) to generate a bcrypt hash. To verify, paste a password and a bcrypt hash to check if they match. Used for secure password storage.

Bcrypt Hashing

Generate secure Blowfish-based hashes with custom work factors.

Text to Hash

Salt Rounds (Cost Factor): 10Standard

Faster / Less SecureSlower / More Secure

Higher rounds exponentially increase the time needed to crack the hash but also increases generation time. 10-12 is recommended for modern web apps.

Hash Verifier

Compare a plain-text string against an existing Bcrypt hash to verify accuracy.

Plain Text String

Bcrypt Hash

Waiting for input to verify...

Developer Note

Bcrypt verification is safe to perform client-side as the hash contains the salt needed for comparison. No data is sent to the server.

Key Takeaways

Bcrypt is a password hashing function designed to be slow — resistant to brute force
Cost factor (salt rounds) controls computational difficulty: 10 = ~100ms, 12 = ~400ms
Each hash includes a random salt — same password produces different hashes
Output format: $2b$[cost]$[22-char salt][31-char hash]
Industry standard for password storage in web applications

What is Bcrypt Generator?

Bcrypt Generator — A Bcrypt Hash Generator is a free tool that hashes passwords using the bcrypt algorithm and verifies plaintext passwords against existing bcrypt hashes.

Generate bcrypt password hashes and verify passwords against existing hashes with this free online tool. Bcrypt is the industry-standard password hashing algorithm used by Express.js, Django, Ruby on Rails, Laravel, and Spring Boot for secure credential storage. Set the cost factor (salt rounds) from 4 to 16 — higher values increase computation time exponentially, making brute-force attacks impractical. Each hash automatically includes a unique random salt, so the same password produces different hashes every time. Use the verifier to check if a plaintext password matches a stored bcrypt hash during development and QA testing.

How to Use Bcrypt Generator

1
Enter the password you want to hash in the input field.
2
Set the cost factor (10–12 recommended for production, 4–6 for fast testing).
3
Click Generate to create the bcrypt hash — copy it for your database seed or auth config.
4
Switch to Verify mode to check if a plaintext password matches an existing bcrypt hash.

Key Features

Bcrypt hash generation with adjustable cost factor (salt rounds 4–16)

Password verification — check plaintext against existing bcrypt hashes

Automatic random salt generation (built into every bcrypt hash)

Output in standard $2b$ format compatible with all bcrypt libraries

Client-side hashing — passwords never sent to any server

Use Cases

Generating password hashes for database seed files and user migrations

Verifying bcrypt hashes during login flow development and debugging

Testing cost factor performance to balance security and login speed

Comparing bcrypt output across Node.js, Python, and PHP implementations

About Bcrypt Generator

Bcrypt is deliberately slow by design — it uses a configurable cost factor that doubles computation time with each increment. At cost factor 10, hashing takes ~100ms; at 12, ~400ms; at 14, ~1.6 seconds. This intentional slowness makes brute-force password cracking impractical even with modern GPUs. Each bcrypt hash includes a built-in random salt, eliminating rainbow table attacks entirely.

The bcrypt hash format is $2b$[cost]$[22-char salt][31-char hash]. The $2b$ prefix identifies the algorithm version, making hashes self-describing and portable across languages. Bcrypt remains the recommended default for password hashing in 2026, with Argon2 as an alternative for applications that need memory-hard resistance against ASIC attacks.

Frequently Asked Questions

What cost factor (salt rounds) should I use for bcrypt?: Use 10–12 for production web applications in 2026. Cost factor 10 takes ~100ms, 12 takes ~400ms. Each increment doubles the time. Use 4–6 for unit tests to keep test suites fast.
Why does the same password produce different bcrypt hashes?: Bcrypt automatically generates a unique random salt for each hash. The salt is embedded in the hash output, so verification still works — bcrypt extracts the salt during comparison.
Is bcrypt better than SHA-256 for passwords?: Yes. SHA-256 is too fast for password hashing — attackers can try billions of guesses per second. Bcrypt is intentionally slow and includes automatic salting, making it far more resistant to brute-force attacks.
What is the difference between bcrypt and Argon2?: Bcrypt is CPU-hard (slow to compute). Argon2 is both CPU-hard and memory-hard, making it more resistant to GPU and ASIC attacks. Bcrypt is more widely supported; Argon2 is newer and recommended for high-security applications.
Can I verify a bcrypt hash from another programming language?: Yes. Bcrypt hashes are portable across languages. A hash generated in Node.js can be verified in Python, PHP, Ruby, or any language with a bcrypt library, as long as the $2b$ format is used.
Should I store plaintext passwords in my database?: Never. Always hash passwords with bcrypt (or Argon2) before storage. Even if your database is breached, attackers cannot recover plaintext passwords from properly hashed values.

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Frequently Asked Questions

What cost factor (salt rounds) should I use for bcrypt?

Use 10–12 for production web applications in 2026. Cost factor 10 takes ~100ms, 12 takes ~400ms. Each increment doubles the time. Use 4–6 for unit tests to keep test suites fast.

Why does the same password produce different bcrypt hashes?

Bcrypt automatically generates a unique random salt for each hash. The salt is embedded in the hash output, so verification still works — bcrypt extracts the salt during comparison.

Is bcrypt better than SHA-256 for passwords?

Yes. SHA-256 is too fast for password hashing — attackers can try billions of guesses per second. Bcrypt is intentionally slow and includes automatic salting, making it far more resistant to brute-force attacks.

What is the difference between bcrypt and Argon2?

Bcrypt is CPU-hard (slow to compute). Argon2 is both CPU-hard and memory-hard, making it more resistant to GPU and ASIC attacks. Bcrypt is more widely supported; Argon2 is newer and recommended for high-security applications.

Can I verify a bcrypt hash from another programming language?

Yes. Bcrypt hashes are portable across languages. A hash generated in Node.js can be verified in Python, PHP, Ruby, or any language with a bcrypt library, as long as the $2b$ format is used.

Should I store plaintext passwords in my database?

Never. Always hash passwords with bcrypt (or Argon2) before storage. Even if your database is breached, attackers cannot recover plaintext passwords from properly hashed values.

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Bcrypt Password Hash Generator & Verifier

Developer Note

Key Takeaways

What is Bcrypt Generator?

How to Use Bcrypt Generator

Key Features

Use Cases

About Bcrypt Generator

Frequently Asked Questions

Bcrypt Password Hash Generator & Verifier

Developer Note

Key Takeaways

What is Bcrypt Generator?

How to Use Bcrypt Generator

Key Features

Use Cases

About Bcrypt Generator

Frequently Asked Questions