Visual Studio

The F# Formatting extension sets up Fantomas as the default formatter for F# files, configurable from Visual Studio's options.
Do note that the extension might not be up to date with the latest version of Fantomas.

• Visual Studio 2019
• Visual Studio 2022

Visual Studio for Mac

1. Install fantomas locally with dotnet tool install fantomas and configure it as an External Tool.
2. Open the external tool window by going to Tools -> Edit custom tools
3. Click Add and fill in the information
4. Run fantomas inside Tools -> fantomas