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An open-source user mode debugger for Windows for reverse engineering and malware analysis.

Active development: x64dbg is under constant active development.
GPLv3: we provide both the executable and the source. Feel free to contribute.
Customizable: write plugins in C++, change colors and tweak your preferences.
x64/x32 support: x64dbg can debug both x64 and x32 applications. There is only one interface.
Built on open-source libraries: x64dbg uses Qt, TitanEngine, Zydis, Yara, Scylla, Jansson, lz4, XEDParse, asmjit and snowman.
Simple, powerful development: x64dbg uses C++ and Qt to quickly add new features.
Scriptable: x64dbg has an integrated, debuggable, ASM-like scripting language.
Community-aware: x64dbg has many features thought of or implemented by the reversing community.
Extendable: Write plugins to add script commands or to integrate your tools.

- Open-source
- Intuitive and familiar, yet new user interface
- C-like expression parser
- Full-featured debugging of DLL and EXE files (TitanEngine)
- IDA-like sidebar with jump arrows
- IDA-like instruction token highlighter (highlight registers, etc.)
- Memory map
- Symbol view
- Thread view
- Source code view
- Graph view
- Content-sensitive register view
- Fully customizable color scheme
- Dynamically recognize modules and strings
- Import reconstructor integrated (Scylla)
- Fast disassembler (Zydis)
- User database (JSON) for comments, labels, bookmarks, etc.
- Plugin support with growing API
- Extendable, debuggable scripting language for automation
- Multi-datatype memory dump
- Basic debug symbol (PDB) support
- Dynamic stack view
- Built-in assembler (XEDParse/asmjit)
- Executable patching
- Analysis