RunAsUser

RunAsUser – Lightweight User-Switching Utility for Windows

RunAsUser, developed by Dennis Babkin, is a free and lightweight utility for Windows that allows you to run programs under a different user account than the one currently logged in. Perfect for IT professionals and advanced users, it enables quick user-switching without logging out or switching sessions.

The tool is just a few kilobytes in size, ad-free, and safe from malware, making it an efficient, no-frills solution for managing multiple user environments. RunAsUser operates via the command prompt, allowing you to input the desired username and password directly for the alternate account.

Whether you're testing user permissions or managing admin tasks, RunAsUser provides a simple and effective way to run software as another user—completely free and indefinitely usable.