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Super Mario Bros. 3 — play in your browser

It runs right on this page: no download, no installer, no account. The emulator and the game are hosted by us and pull about 0.4 MB on the first launch.

Super Mario Bros. 3
about 3 MB will load on the first launch

The game runs in your browser through a DOS emulator. Nothing is installed, progress lives while the tab is open.

Everything runs in your browser. What you type is never sent to our server.

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About the game

The one with the world map, the raccoon tail and the flying: eight worlds, secret whistles and levels that hide more than they show.

Nintendo, 1988. Still the game most designers point at when they explain what a good platformer level looks like.

Controls

  • Arrows — move
  • Z and X — action buttons
  • Enter — Start
  • Shift — Select
  • On a phone the buttons appear on screen

The version in short

  • Platform: NES / Dendy
  • Year: 1988
  • Genre: Platformer
  • Size: 0.4 MB, loaded once

How this runs

The emulator and the cartridge are hosted by us and everything is computed in your browser: nothing goes to a third-party site. Saves are written into this browser on this device. More about the section on the retro games page.

FAQ

Is this the actual 1988 cartridge?

Yes, the original Super Mario Bros. 3 ROM, unmodified. The emulator runs it the way the console did.

How big is it and what loads?

The cartridge is 0.4 MB plus the emulator. It loads once and then comes from the browser cache.

Can I play on a phone?

Yes. On a touch screen the emulator draws its own d-pad and action buttons. Landscape gives a much bigger picture.

Are saves kept?

In this browser on this device. Another browser or a cleared cache means starting over.

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