Bcrypt Checker

Bcrypt verification is the process of confirming that a plaintext password corresponds to a stored bcrypt hash. Because bcrypt is a one-way function, you cannot "decrypt" a bcrypt hash — you can only re-hash the candidate password with the same salt (embedded in the hash) and compare the result. The bcrypt hash string contains everything needed for verification: the algorithm version ($2b$), the work factor, the 22-character base64-encoded salt, and the 31-character hash. This self-contained format is what makes bcrypt so robust. Developers use bcrypt checkers to debug authentication code, verify that hashes were generated correctly, and test user authentication flows without needing a live database.