jessecar96/steamdesktopauthenticator

Steam Desktop Authenticator is a Windows application that lets you use Steam's two-factor login system from your desktop computer instead of a phone. When you log in to Steam or confirm a trade, Steam normally requires you to approve it through its mobile app. This project was a community-built alternative that handled those approvals from a desktop. The project is no longer supported and will not receive updates. The README prominently warns against using it. The core security concern the authors raise is that running an authenticator on your desktop computer weakens the protection two-factor authentication is supposed to provide: if your computer gets infected with malware, an attacker could access the authenticator directly and bypass the login protection entirely. The authors state clearly that this application does not protect your account, it only lets you use Steam features that require an authenticator without owning a phone. The README also warns that fake versions of this application have appeared online that steal Steam accounts. If you choose to use it despite the warnings, the authors say to only download it from the official GitHub repository. Setup requires installing .NET 8 and then running the provided executable. You still need a mobile phone capable of receiving SMS during the initial account setup. The application stores account credentials in a local folder called maFiles, and the README stresses the importance of backing up that folder and saving your revocation code, because losing both means losing access to your Steam account with no recovery path other than contacting Steam Support. The project runs on Windows 10 and later and was built by community volunteers with no affiliation to Steam.