Visual Assist is a plug-in for Microsoft Visual Studio developed by Whole Tomato Software. The plug-in primarily enhances IntelliSense and syntax highlighting, along with navigating through source code and providing flexible refactorings. It also enhances code suggestions, can generate or rewrite code, and includes spell checking support for comments, as well as adding enhanced debugging tools. It can also detect syntax mistakes such as use of undeclared variables, and provides code analysis to detect potential bugs or performance issues in source code.
Visual Assist supports Visual C++ and Visual C#.
As of March 2023, Visual Assist supports Visual C++ 2022 right back to Visual Studio 2005, including the Community Editions. Support for Visual Studio 6.0 - 2003 was deprecated in 2017, though the latest version to support those older IDEs is still available for download. (Visual Studio Express editions lack third-party extensibility and Visual Studio Code uses a separate extensibility model, thus Visual Assist cannot be used with them.)