WinDbg vs x64dbg — which Windows debugger?

Last updated: · By the BinBench editorial team · Stars and releases checked via the GitHub API
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Quick answer

WinDbg is Microsoft's free debugger for user-mode and kernel-mode Windows work, crash dumps and Time Travel Debugging (as documented on Microsoft Learn). x64dbg is a GPL-3.0 open-source user-mode debugger popular for interactive Windows RE labs. They overlap on user-mode stepping, but they are not substitutes for every job.

On this page

Snapshot

DimensionWinDbgx64dbg
PublisherMicrosoftx64dbg project
CostFreeFree (GPL-3.0)
Open sourceEngine/docs public; product is Microsoft toolingGitHub GPL-3.0
User-mode
Kernel-mode / dumpsDocumented primary strengthUser-mode focus
PlatformsWindows 10 1607+ / Windows 11 (x64, ARM64 per Learn)Windows only
Install examplesStore, direct installer, winget install Microsoft.WinDbgOfficial builds from x64dbg.com / GitHub
Checked against Microsoft Learn and x64dbg project pages on 2026-10-24 (UTC).

When WinDbg fits

  • Kernel drivers, crash dump analysis, and Microsoft-supported workflows.
  • Modern UI + scripting + Time Travel Debugging features described in current WinDbg docs.
  • Teams already standardized on Debugging Tools for Windows.

When x64dbg fits

  • Interactive user-mode reversing on authorized PE targets.
  • Plugin ecosystems aimed at classic RE lab workflows.
  • Users who want a fully open-source GPL debugger UI.
Which to pick
  • Need kernel / dumps / Microsoft support matrix → WinDbg.
  • Need open-source user-mode GUI → x64dbg.
  • Many labs install both.

Authorized targets only. BinBench does not host debugger builds.

FAQ

Is WinDbg free?

Yes. Microsoft distributes WinDbg at no charge via direct download, Microsoft Store and winget (winget install Microsoft.WinDbg).

Is x64dbg free and open source?

Yes. x64dbg is GPL-3.0 (see the repository LICENSE) and Windows-only for user-mode debugging.

Can x64dbg do kernel debugging?

x64dbg focuses on user-mode. For kernel-mode Windows debugging, use WinDbg / Debugging Tools for Windows as Microsoft documents.

Which should beginners start with?

Many malware lab and crackme students (on authorized samples) start with x64dbg's GUI. Driver and crash-dump work usually needs WinDbg.

Does BinBench cover game cheats?

No. Authorized analysis only.

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