Bcrypt Hash Generator
Hash passwords with bcrypt and verify hashes
Higher rounds improve resistance to brute-force attacks but increase hashing time. For most web apps, 10 to 12 remains a sensible baseline.
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Salt Rounds
10
Hash output
None
Verification
Not verified
Result
No result yet
Privacy & Trust
Adaptive cost factor
Bcrypt deliberately slows hashing with configurable rounds, which helps it age better as commodity hardware gets faster.
Hash, never encrypt
Passwords should be hashed one-way and verified by comparison. They should not be stored in plaintext or reversible encrypted form.
Keep production checks server-side
This browser tool is useful for testing and education, but real auth flows should hash and verify credentials inside your secure application backend.
Export hash
Generate a hash first to enable export.
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How to Use
Paste or Type Input
Enter your text, code, or data into the input area.
Choose Options
Select the transformation or format you want to apply.
Copy the Result
Copy the output to your clipboard with one click.
Why Use This Tool
100% Free
Core tools are free. AI and cloud tools may have daily usage limits.
No Installation
Runs entirely in your browser. No software to download or install.
Private & Secure
Local tools keep input on your device. Tools that transmit data are clearly labelled.
Works on Mobile
Fully responsive — use on your phone, tablet, or desktop.
Bcrypt Password Hashing: Secure Storage Best Practices
Key Takeaways
- Bcrypt is a password hashing function designed to be deliberately slow, making brute-force attacks computationally expensive.
- The cost factor (work factor) controls how many iterations bcrypt performs — increasing it doubles the computation time with each increment.
- All bcrypt hashing runs in your browser — your passwords are never transmitted to any server.
Storing passwords as plain text or simple hashes is a critical security failure. Bcrypt was specifically designed for password hashing, incorporating a built-in salt and an adjustable cost factor that makes it resistant to brute-force and rainbow table attacks. It remains one of the most recommended password hashing algorithms alongside Argon2 and scrypt.
250 ms
Compute time per hash at cost factor 12
Key Concepts
Built-in Salt
Bcrypt automatically generates and embeds a 128-bit random salt in each hash. This means identical passwords produce different hashes, defeating rainbow table attacks entirely.
Cost Factor (Work Factor)
The cost factor determines the number of iterations (2^cost). A cost of 10 means 1,024 rounds. Each increment doubles computation time. Current recommendation is 10–12 for web applications.
Hash Format
Bcrypt hashes follow the format $2b$cost$salt+hash — the algorithm version ($2b$), cost factor, 22-character salt, and 31-character hash are all encoded in the 60-character output string.
Bcrypt vs. Other Algorithms
Bcrypt is CPU-hard but not memory-hard. Argon2 (the Password Hashing Competition winner) adds memory hardness. Scrypt adds both memory and CPU hardness. For most web applications, bcrypt remains a solid choice.
Pro Tips
Use a cost factor of at least 10 (ideally 12) — benchmark on your hardware and choose a cost that takes 200–500ms per hash.
Bcrypt truncates passwords at 72 bytes — for longer passwords, pre-hash with SHA-256 before passing to bcrypt.
Never implement your own bcrypt — use well-tested libraries like bcryptjs (JavaScript) or bcrypt (Python, Ruby, Go).
Increase the cost factor periodically as hardware gets faster — rehash passwords on next login when upgrading.
All bcrypt hash generation is performed entirely in your browser. Your passwords are never transmitted to any server. Note: browser-based bcrypt is slower than native implementations — this tool is intended for testing and education.