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DOS Wasm X

DOS Wasm X is a free DOS emulator that runs in a web browser using WebAssembly and the DOSBox-X codebase.

Place
#10 of 26
Score
6.2
DOS Wasm X's website

What DOS Wasm X is

DOS Wasm X is a free DOS emulator that runs in a web browser using WebAssembly and the DOSBox-X codebase. It supports DOS-compatible software and offers virtual drives in 512 MB, 1 GB or 2 GB sizes, with RAM options of 32 MB, 64 MB and 128 MB. The drive saves in the browser for later use and can be exported as an image. The emulator accepts ISO, ZIP, BIN, CUE, IMG and 7z files, and supports file import and export as well as changing a CD while running. Controls include mobile mode, an on-screen keyboard, gamepad support, mouse capture, zoom and full screen; users can also adjust CPU speed, emulator time and mouse sensitivity. Audio, dark mode and resolution resizing are listed. Windows 95 or Windows 98 can be installed using the user's own Windows copy and ISO. The project can be hosted on a web server or run in a container, and its README points to online documentation. Shut down Windows inside the emulator before leaving to save drive changes.

Good

  • Free browser-based emulator built on WebAssembly.
  • Offers three virtual drive sizes and three RAM options.
  • Supports gamepads, mobile mode and on-screen keyboard.
  • Can import and export files and disk images.

Watch out

  • Windows installation requires the user's own copy and ISO.
  • Windows should be shut down before leaving to save changes.
  • No security certifications or compliance claims are stated.

Who it suits

DOS Wasm X suits people who want to run DOS-compatible software in a browser, including on mobile. It may also suit users who want to host the project themselves or run it in a container.

Verdict

DOS Wasm X provides configurable DOS emulation in a browser, with file handling and several input options. Keep the Windows shutdown step in mind if using a Windows guest.

Plans and prices

From DOS Wasm X's own pricing page, checked 4 Oct 2026.

All about pricing
PlanPriceWhat it gives you
FreeFreeBrowser based DOS emulator · hard drive options: 512mb, 1 gig, or 2 gig · RAM options: 32mb, 64mb, or 128mb

The facts

Each one read from DOS Wasm X's own pages, with the date it was checked.

What it does

Audio and display
The README lists audio support, dark mode, and resolution resizing.checked 4 Oct 2026
Container deployment
The README provides a Docker command to run the app in a container.checked 4 Oct 2026
Drive storage
The in-browser hard drive has 512mb, 1 gig, or 2 gig options and can be exported as an image for local saving.checked 4 Oct 2026
Emulator controls
Users can adjust CPU speed and emulator time, change mouse sensitivity, and pause or resume the emulator.checked 4 Oct 2026
File formats
It lists automatic support for ISO, ZIP, BIN, CUE, IMG and 7z files.checked 4 Oct 2026
File transfer
Users can import and export files into and out of the emulator and load or change a CD while it is running.checked 4 Oct 2026
Input and display
Features include mobile mode, an on-screen keyboard, gamepad support, full screen, zoom controls and mouse capture.checked 4 Oct 2026
Input and mobile
It supports mobile mode, an on-screen keyboard, gamepads, and mouse capture.checked 4 Oct 2026
Integrations
The README identifies DOSBox-X as the core engine, DOSBox Pure for the on-screen keyboard, JS Dos for its Asyncify module, and Emscripten among the codebases used.checked 4 Oct 2026
Memory limit
The listed RAM options are 32 MB, 64 MB and 128 MB.checked 4 Oct 2026
Notable usage note
The app advises shutting down Windows in the guest OS before leaving the page to save hard drive changes and prevent Scandisk from running at the next boot.checked 4 Oct 2026
Purpose
DOS Wasm X is a browser-based DOS emulator built around ease of use and stability, based on the DosBox-X codebase.checked 4 Oct 2026
Security and affiliation
The maker states that the app was made for fun and is not affiliated or associated with Microsoft.checked 4 Oct 2026
Security and compliance
The opened maker pages do not state any security certifications or compliance claims.checked 4 Oct 2026
Self-hosting
The project says users can host it on their own web server by copying the dist folder.checked 4 Oct 2026
Storage
The browser hard drive has 512 MB, 1 GB or 2 GB size options and can be exported as an image for local saving.checked 4 Oct 2026
Storage behavior
The README says the hard disk saves directly in the browser so users can return later and continue.checked 4 Oct 2026
Support
The README points users to online documentation for more extensive guides and technical information.checked 4 Oct 2026
WebAssembly
The application is fully web based and uses WebAssembly.checked 4 Oct 2026

Where it runs

Windows installation requirement
Installing Windows 95 or Windows 98 requires the user's own Windows copy and ISO.checked 4 Oct 2026
Windows support
It supports installing Windows 95 or Windows 98 using the user's own copy of Windows.checked 4 Oct 2026

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