EM-DOSBox
EM-DOSBox: A developer-focused, open-source route for packaging DOS software for browser delivery. Ranked #11 of 26 in MS-DOS Emulators by our editors (6.2/10); pricing: Free plan; best for developers packaging DOS programs for browsers.
At a glance
- Editor score6.2 / 10
- PricingFree plan
- Best forDevelopers packaging DOS programs for browsers
- Free planYes
- Paid fromNone
- Supported host platformsweb
- Facts checked20 Sep 2026
Where it wins
- Compiles DOS software to JavaScript and WebAssembly with Emscripten
- Packages executables or directories into browser-loadable HTML and data files
- Mounts multiple disk-image formats with gamepad and CD audio support
Where it doesn't
- The published platform is limited to web browsers
- The workflow is aimed at users who can build and serve the application
- It is narrower than general-purpose desktop emulators
Our verdict on EM-DOSBox
EM-DOSBox is an open-source Emscripten port of DOSBox for running DOS games and other DOS programs in a web browser. Its primary audience is developers packaging legacy software for browser delivery, along with users who can build and serve the generated browser application. The project compiles to JavaScript and WebAssembly and includes browser-oriented packaging tools for turning DOS executables or directories into HTML and data files.
Its strongest area is the range of browser packaging and media options. EM-DOSBox can mount directories, floppy images, CD-ROM images, and hard-drive images. Supported CD-ROM image formats include ISO, CUE/BIN, and CUE/IMG. Gamepad input and CD audio support extend its usefulness for browser-based DOS games, while DOSBox configuration files allow adjustments for speed, audio, and graphics settings. Emscripten Asyncify support is also included for interactive browser use. These capabilities make it a practical fit for projects that need to present DOS software through a web interface rather than a traditional desktop application.
The main trade-off is the build-oriented workflow. EM-DOSBox is distributed as source code under the GNU General Public License, with build instructions and tools intended for people comfortable preparing and serving the resulting web application. It does not present the broader desktop platform coverage of a general-purpose emulator, so it is less suitable for someone seeking a ready-to-run local DOS environment across multiple operating systems. Choose EM-DOSBox when browser compilation, custom packaging, and source availability matter; choose a broader desktop emulator when local installation and wider host-platform support are the priority.
EM-DOSBox pricing
EM-DOSBox fact sheet
| Free plan | Yes |
|---|---|
| Paid from | None |
| Supported host platforms | web |
| DOS target versions | Not verified |
| Disk image formats | ISO, CUE/BIN, CUE/IMG, floppy images, hard-drive images |
| Gamepad support | Yes |
| Save states | Not verified |
| Audio CD support | Yes |
| Source available | Yes |
| Deployment | Self-hosted |
| Platforms | Web |
| Support | Community, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
Alternatives to EM-DOSBox
- DOSBox StagingA capable free emulator for DOS software, games, and Windows 3.1 environments.9.0
- DOSBox PureA focused, free DOS emulator with convenient archive loading and Libretro support.8.8
- DOSBox-XA free, highly configurable choice for advanced DOS and legacy Windows emulation.7.7
See all EM-DOSBox alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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