SLN is a Microsoft Visual Studio solution grouping related projects. Opened by Visual Studio. The .sln file ties together all the projects that make up a Visual Studio solution. Despite the name, an SLN is not XML but a custom plain-text layout listing each project by a unique GUID. Microsoft has begun replacing it with a simpler XML-based SLNX solution format supported by MSBuild.

How do I open a .SLN file?

Drop a .SLN file onto Analyser at https://lab.valjdakosta.com/ and it opens directly in your browser - no upload, no account and no software to install. Open Visual Studio solution files - the classic text .sln and the newer XML .slnx (Visual Studio 2022 and the dotnet sln tooling) - in the browser: the solution format version and Visual Studio release, every project it groups (name, path, language and GUID) and the build configurations (Debug/Release platforms). MonoDevelop / Unity .userprefs files - the IDE's open documents and editor state - are shown as readable XML.

Can I open a .SLN file online for free?

Yes. Analyser is a free online .SLN opener and viewer that runs entirely in your browser - your .SLN file never leaves your device, so there is nothing to upload and no software to install. It even works offline once installed.

.SLN file - what it is and how to open it online

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What is a .SLN file?

SLN is a Microsoft Visual Studio solution grouping related projects. Opened by Visual Studio.

Did you know: The .sln file ties together all the projects that make up a Visual Studio solution.
Despite the name, an SLN is not XML but a custom plain-text layout listing each project by a unique GUID.
Microsoft has begun replacing it with a simpler XML-based SLNX solution format supported by MSBuild.
What Analyser shows you: Open Visual Studio solution files - the classic text .sln and the newer XML .slnx (Visual Studio 2022 and the dotnet sln tooling) - in the browser: the solution format version and Visual Studio release, every project it groups (name, path, language and GUID) and the build configurations (Debug/Release platforms). MonoDevelop / Unity .userprefs files - the IDE's open documents and editor state - are shown as readable XML.
Open a .SLN file: Drag a .SLN file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.
Related formats: .SLNX · .USERPREFS. See all supported file types.