What is the difference between bcrypt and MD5 or SHA hashing?

Bcrypt is specifically designed for password hashing with built-in salt and adaptive cost factors that make it resistant to brute-force attacks, while MD5 and SHA are general-purpose hash functions that are fast but unsuitable for passwords. MD5 and SHA have known vulnerabilities and no built-in salt, making them dangerous for password storage. Bcrypt's computational cost increases over time, providing future protection against improved hardware.

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

A cost factor between 10-12 is recommended for most applications, offering a good balance between security and performance. For highly sensitive systems like banking applications, use 12-14, while for less critical applications, 10 is acceptable. Higher values provide better security but increase processing time, so test with your specific hardware to find the optimal balance for your use case.

Is it safe to use this tool to hash real passwords?

Yes, this tool is completely safe because all processing happens client-side in your browser. Your passwords never leave your device or get sent to any server, ensuring maximum privacy and security. The hashing is performed locally using your browser's computational resources, making it ideal for hashing real passwords for development, testing, and production use.

Can I reverse a bcrypt hash to get the original password?

No, bcrypt hashes are cryptographically irreversible by design. This is a key security feature that prevents attackers from recovering original passwords even if they obtain the hash. The only way to verify a password is by hashing the entered password and comparing it to the stored hash, which is what the verification feature of this tool does.

How long does it take to generate a bcrypt hash?

Generation time depends on the cost factor you select. A cost factor of 10 typically takes 100-200 milliseconds, while higher factors take exponentially longer. This delay is intentional and provides security by making brute-force attacks computationally expensive. This tool performs all calculations in your browser, so speed depends on your device's processing power.

Bcrypt Hash Generator

Plaintext

Rounds (Cost Factor)12

4 (Faster)16 (Stronger)

4,096 iterations — slower but more secure

How to Use Bcrypt Hash Generator

When to Use Bcrypt Hash Generator

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Bcrypt Hash Generator

How to Use Bcrypt Hash Generator

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Technical Information

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