de4dot is an open source .NET deobfuscator and unpacker written in C# that attempts to restore packed and obfuscated assemblies to their original state. The tool uses dnlib to read and write assemblies and can handle various obfuscation techniques depending on the obfuscator used. It can inline methods that have been moved to separate static methods by obfuscators, decrypt strings both statically and dynamically, and decrypt other encrypted constants. While de4dot can restore most obfuscation techniques completely, it cannot restore original symbol names since these are typically not preserved in obfuscated assemblies. The tool is distributed under the GPLv3 license and binaries are available from the build server without support.