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Best for: Reverse engineers and developers inspecting or debugging .NET programs

Best for: Debugging and patching Windows binaries during reverse engineering

Free and open source.

Free and open source under the GPLv3.

• Decompiler, debugger and assembly editor in one tool
• Debugs .NET assemblies without their source code
• Maintained continuation of a widely used tool

• IDA-like sidebar, jump arrows and token highlighting make it immediately readable
• Import reconstruction with Scylla and a built-in assembler for patching
• Yara pattern matching and a Snowman decompiler included
• A scriptable, debuggable automation language plus a growing plugin API

• Unofficial fork of the original project
• Windows only

• Windows only
• Antivirus software frequently flags it and the things it is used on
• PDB symbol support is basic compared with a commercial debugger
• The decompiler is far weaker than Ghidra's or IDA's

• Official website
• Full listing and sources

Sources for dnSpyEx

• github.com/dnSpyEx/dnSpy

Catalog checked September 24, 2026

• Official website
• Full listing and sources

Sources for x64dbg

• github.com/x64dbg/x64dbg

Catalog checked September 21, 2026