Several web-based tools can extract code, metadata, and insights from DLL files without requiring local software installation. 1. Decompiler.com
dotPeek can identify local source code based on PDB files or fetch source code from source servers such as Microsoft Reference Source Center or SymbolSource.org.
The effectiveness of a decompiler depends heavily on the language used to write the original DLL. 1. Managed Code (.NET / C# / VB.NET)
