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MartyPCPCjs
Free

Free and open source.

 Free

Free to use in the browser, with source published on GitHub.

Windows, macOS, Linux Web
  • Cycle-accurate IBM PC and XT emulation
  • Runs timing-sensitive demos and software
  • Runs vintage DOS, Windows and OS/2 machines with no installation
  • Works on desktop and mobile browsers, including iPhone and iPad
  • Focused on early PCs, not later 386 or Pentium machines
  • Accuracy comes at a higher CPU cost than simpler emulators
  • Limited to a curated set of machines and configurations
  • Emulates slow period hardware, not suited to modern workloads
Downloadable app Web application
Open source Open source
License: MIT License not stated
No account needed No account needed
Works offline Not stated if it works offline

Checked October 2, 2026

Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.