Jazz Jackrabbit in the Browser: OpenJazz Guide (Bring the Shareware)

Jazz Jackrabbit in your browser: the honest OpenJazz route Partial — original is DOS; play via OpenJazz (Win32)

Guide updated July 2026 · Runs via Wine 1.7.55 (Win32) + WebAssembly · Requires your own copy

Jazz Jackrabbit — Epic MegaGames' blisteringly fast 1994 run-and-gun platformer, the one that made a gun-toting green rabbit a DOS-era icon. Here's the honest catch up front: the original game is a DOS program (a 386 protected-mode EXE), and ExeBrowser runs Windows binaries on Wine + WebAssembly, not raw DOS. So the original JAZZ.EXE won't boot here. The good news: the open-source OpenJazz engine is a real Win32 program that loads the original Jazz data files and runs nicely in this player — load it together with the shareware data below and you can play the free levels in a browser tab.

Runs in your browser tab with WebAssembly + Wine — nothing is uploaded. Click the screen to capture input; press Esc to release the mouse.

Bring your own copy. Jazz Jackrabbit is © Epic Games (formerly Epic MegaGames). The shareware episode is widely distributed, but Epic's license attaches conditions (it must be labeled shareware, not freeware or public domain; Epic must be credited; files must stay unaltered; any distribution fee is capped). Because of those conditions we don't host the files here — grab the shareware from a legitimate archive, or buy the full game on GOG. Please don't ask for cracks or "full version free" downloads — this page won't provide them.

How it works & what to expect

Why the original EXE won't run — and what does

Jazz Jackrabbit (1994) is a DOS game: it needs a 33 MHz 386, 4 MB of RAM, and runs in protected mode via a DOS extender. ExeBrowser's runtime is Boxedwine — Wine 1.7.55 plus a 32-bit x86 emulator — which executes Win32 and Win16 Windows programs. It is not a DOS emulator, so it can't load the original JAZZ.EXE. (For straight DOS play, a DOSBox-based site is the right tool.)

The practical route on ExeBrowser is OpenJazz (OpenJazz.exe): a faithful, GPL open-source re-implementation of the Jazz engine, shipped as a small 32-bit Windows executable. It doesn't include any game art or levels — you point it at the original Jazz data files (the shareware set is fine) and it plays them. That keeps everything legal: the engine is free software, and the level data is the shareware you already own.

How to play it here

Get a Windows build of OpenJazz from its official releases page (GPL, free).
Get the Jazz Jackrabbit shareware data files from a legitimate archive (or copy them from your GOG install). You want the level data files — the .000 / .j1 resources — plus the shareware levels.
Put OpenJazz.exe and the Jazz data files together in one folder so the engine can find its data.
Click ▶ Play above to boot Wine on this page, then use Load your own copy → a folder and select that folder.
Pick OpenJazz.exe as the entry and click Run in Wine. Click the canvas to capture input.

This is a two-piece setup by design (free engine + your own data). It's a little more fiddly than a one-click game, but it's the honest, legal way to play Jazz in a browser.

What to expect: speed, sound, controls

OpenJazz is light and 2D, so it tends to run at full speed in the player even though an x86 CPU is being emulated inside WebAssembly (roughly 10–40% of native, which is plenty for a 1994 platformer). Sound and music depend on the build and your browser, and the original tracker music may not always play cleanly under emulation — gameplay is the reliable part.

Default controls follow the classic layout:

← → run, ↑ aim up / enter doors, ↓ crouch
Space or Alt jump · Ctrl fire
Enter confirm menus · Esc pause / release the mouse back to the page

If a particular OpenJazz build misbehaves, try the r18 Wine variant from the runtime menu before giving up.

Frequently asked questions

Can I play the original Jazz Jackrabbit EXE in the browser here?

Not directly. The original 1994 game is a DOS program, and ExeBrowser runs Windows (Win32/Win16) binaries on Wine, not raw DOS. The realistic way to play on this site is the open-source OpenJazz engine, which is a Win32 executable that loads the original Jazz data files.

Is Jazz Jackrabbit shareware free and legal to download?

The shareware episode is widely distributed, but Epic's license is conditional — it must be labeled shareware (not freeware or public domain), Epic must be credited, the files must stay unaltered, and any distribution fee is capped. Because of those strings we don't host the files here; get them from a legitimate archive, or buy the full game on GOG.

What is OpenJazz and do I still need the original game?

OpenJazz is a free, GPL-licensed re-implementation of the Jazz Jackrabbit engine. It ships no game art or levels, so yes — you supply the original data files (the shareware set works). Engine free, data yours: that keeps it legal.

Why is this rated 'partial' instead of 'works well'?

Because the original DOS executable can't boot on a Win32 Wine runtime at all. You can play the shareware levels through OpenJazz, which works well, but it's a two-piece setup (free engine plus your own data) rather than a one-click launch of the real EXE — so 'partial' is the honest call.

Will the music and sound work?

Gameplay is reliable; audio is hit-or-miss. The original tracker music and effects depend on the OpenJazz build and your browser, and may not always play cleanly through the emulator. Treat sound as a bonus, not a guarantee.