Most .NET libraries (Newtonsoft.Json, Entity Framework, etc.) have permissive licenses allowing decompilation for debugging. However, commercial obfuscated software is off-limits. Telerik’s own UI libraries are obfuscated; JustDecompile will show you IL but not clean C#.

Downsides for users like you:

Look for in the list. If available, click Download .

🔐 Only download from *.telerik.com or *.progress.com . Third-party sites claiming to host the "JustDecompile offline installer" may bundle malware.

The ability to decompile code offline is not a luxury – it’s a necessity for professional .NET developers working in secure, air-gapped, or unstable network environments. By obtaining the genuine , you ensure that you can always access your tools, regardless of internet availability.

A few reasons:

Since JustDecompile is no longer being updated to handle modern .NET versions, Telerik themselves recommends moving to these industry standards: : The leading open-source .NET decompiler. dotPeek : A powerful, free tool from JetBrains.