Passwall is a free password manager available as a Chrome extension. It allows users to securely store their logins and passwords in various categories such as logins, emails, credit cards, bank accounts, private notes, and servers.

One of the key features of Passwall is its 4 layered encryption architecture. Firstly, a secure hash is generated from the user's master password. Then, all logins and passwords are encrypted on the client side using this master hash, ensuring that passwords can only be decrypted by the user. Additionally, Passwall employs end-to-end encryption during data transportation, encrypting all data sent from the client to the server with an always changing transmission key. Finally, passwords are encrypted with a server hash before being saved to the database.

Passwall is an open source software, with its source code hosted on GitHub. This allows users to review, audit, and contribute to the Passwall codebase, ensuring transparency and security. With its user-friendly interface and robust encryption architecture, Passwall is a reliable choice for securely managing passwords.