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Tech riderRev. 20 Sept 2026

EM-DOSBox

Ch 175.8of 26 MS-DOS Emulators
  1. 1Runs onWeb
  2. 2CostsNot stated by the maker
  3. 3Supported host platformsWeb
  4. 4Disk image formatsISO, CUE/BIN, CUE/IMG, floppy images, hard-drive images
  5. 5Gamepad supportYes
  6. 6Audio CD supportYes
  7. 7Source availableYes
6 lines stated Written from the maker's own pages: github.com
Visit site Alternatives
The EM-DOSBox homepage

Overview

EM-DOSBox is ranked #17 of 26 in MS-DOS emulators on Specifiction. It runs on Web.

Compared on MS-DOS emulators

Free plan
Yesgithub.com
Supported host platforms
Webgithub.com
Disk image formats
ISO, CUE/BIN, CUE/IMG, floppy images, hard-drive imagesgithub.com
Gamepad support
Yesgithub.com
Audio CD support
Yesgithub.com
Source available
Yesgithub.com

Facts

Purpose
EM-DOSBox is a DOSBox version that can be compiled with Emscripten to run old DOS games and other DOS programs in a web browser.github.com · 4 Oct 2026
Status
The project says it runs most games successfully in web browsers, though some programs can encounter paging exceptions.github.com · 4 Oct 2026
Build output
An Emscripten build produces dosbox.js, dosbox.wasm when WebAssembly is enabled, and a simple dosbox.html interface.github.com · 4 Oct 2026
Asyncify
Asyncify is enabled by default to make more DOSBox features work, with what the project describes as a very small performance penalty.github.com · 4 Oct 2026
Loading programs
The included packager tools can create web pages that load DOS files into the Emscripten file system and pass command-line arguments to DOSBox.github.com · 4 Oct 2026
Configuration
A dosbox.conf file can be included in a package to change emulator speed, audio, or graphics settings.github.com · 4 Oct 2026
Save-file limitation
Saved games go into an in-memory Emscripten file system by default and are lost when the web page is closed.github.com · 4 Oct 2026
Build limitation
Building in Windows is unsupported because the build process requires a Unix-like environment and GNU Autotools.github.com · 4 Oct 2026
Browser serving
The project says to serve the page through a web server because most browsers block access to other files from file:// URLs.github.com · 4 Oct 2026
License
The repository says DOSBox is distributed under the GNU General Public License and includes a GPL version 2 license file.github.com · 4 Oct 2026
Creator credit
The README credits Boris Gjenero with getting the Emscripten port working, fixing issues, and improving performance.github.com · 4 Oct 2026

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Where it ranks on Specifiction

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Sources