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Best for: Command-line reverse engineering framework and binary analysis toolkit

Best for: Debugging and patching Windows binaries during reverse engineering

The software is free under its open-source licence. Hosting, hardware and external services are separate.

Free and open source under the GPLv3.

• It disassembles, emulates, debugs and patches binaries across a very wide set of architectures, and scripts through r2pipe from most languages.

• 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

• The command syntax is famously steep, and individual plugins carry different licences.

• 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 radare2

• github.com/radareorg/radare2

Catalog checked September 22, 2026

• Official website
• Full listing and sources

Sources for x64dbg

• github.com/x64dbg/x64dbg

Catalog checked September 21, 2026