Developer Security Utility
bcrypt Hash Generator
Convert passwords or text into bcrypt hashes and quickly verify whether the original text matches a bcrypt hash directly in the browser.
Security Testing Tool Notice
This page is a bcrypt tool for development testing and learning. Do not expose real user passwords in the browser; handle production passwords safely in server-side authentication logic.
Generate bcrypt Hash
Enter a password or text to hash, then choose a Cost Factor.
bcrypt is a one-way hash, so the original text cannot be decrypted from the generated hash.
Higher values take longer to compute but make brute-force attacks more expensive.
Because bcrypt includes a salt, the same text produces different hashes.
Generated Result
Copy the generated bcrypt hash or save it as a TXT file.
Enter the original text, then click Generate bcrypt Hash.
Verify bcrypt Hash
Check whether the original text and bcrypt hash match.
A typical bcrypt hash includes a $2a$, $2b$, or $2y$ prefix and is usually 60 characters long.
Help
When should I use a bcrypt Hash Generator?
Use it when developing login, sign-up, or authentication systems to test how password hashing works or to verify whether a bcrypt hash matches the original text.
What is bcrypt?
bcrypt is a one-way hashing algorithm commonly used for password storage. It includes a salt, so the same password generates a different hash each time.
How should I choose the Cost Factor?
- Lower values generate hashes faster but provide weaker protection.
- Higher values make generation and verification slower but increase the cost of attacks.
- For development testing, 10 is a common starting point. For production, consider both server performance and security requirements.
What is the difference between bcrypt and SHA-256?
SHA-256 is suitable for fast hash calculation, but password storage requires additional salt and repeated computation design. bcrypt is designed for password storage and can increase attack cost through salt and Cost Factor.
Important Notes
- Do not enter real user passwords on this page.
- In production services, always hash passwords on the server.
- A bcrypt hash is for verification, not decryption.
- Do not store the generated hash together with the original password.
Why does the hash change every time for the same password?
bcrypt internally uses a salt. Because each hash uses a different salt, the same original text generates a different hash each time.
Can a bcrypt hash be decrypted back into a password?
No. bcrypt is a one-way hash. It does not decrypt the original value; it verifies whether a new input matches the stored hash.
How does verification work?
The original text is compared with the stored bcrypt hash to check whether both came from the same input. The salt information is included inside the bcrypt hash string.