Bcrypt & Argon2 Password Hash Generator

Bcrypt and Argon2id are password hashing algorithms, not encryption. A hash cannot be decrypted to recover the original password. When you generate a hash, the browser runs the selected algorithm locally and includes the parameters needed for later verification in the encoded result. Bcrypt uses a configurable cost factor: higher values take longer to compute and verify. Argon2id also uses memory and iteration settings. Start with your application’s production settings and measure the time on the hardware that will actually verify sign-ins. To test an existing hash, enter a candidate password and the stored hash; the tool recomputes the check locally and reports whether they match. Avoid putting live production credentials into any page you do not control, and clear the inputs after testing.