Life & fun · alternatives · 2026

24 alternatives to ARM Cortex M4 CPU Emulator Running on WebAssembly

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. ARM Cortex M4 CPU Emulator Running on WebAssembly launched in 2024; newer entries below may have overtaken it.

1
My x86 emulator written in JavaScript▲765
Run KolibriOS, Linux or Windows 98 in your browser
2013 · copy.sh · its alternatives →
2MI
MOS6502 in pure Lua running in WebAssembly▲49
2025 · carimbo.run · its alternatives →
3
Running Game Boy ROMs on the STM32 ARM Cortex Microcontroller▲33
Got Tetris running on a 26€ STM32F429 Discovery board emulating the Game Boy CPU and graphics on the ARM Cortex M4. Really fun project to hack together, need to try the original Game Boy Pokemon (red/blue) games next.
2024 · github.com · its alternatives →
4
M68k assembly emulator that runs in the browser▲19
Rebuilt a Motorola 68000 emulator with 50+ instructions — runs entirely in the browser, no install. - gianlucarea/m68k-interpreter
Mar 2026 · github.com · its alternatives →
5
WASM-4 is a virtual game console with a WebAssembly CPU▲9
Build retro games using WebAssembly for a fantasy console
2021 · wasm4.org · its alternatives →
6
WebAssembly▲86
New binary format for compiling applications for the web
2015 · github.com · its alternatives →
7
Running Win32/DirectX games in the browser via x86 emulation and WebGPU▲5
Jul 2026 · bottleship.happydog.games · its alternatives →
8RA
Rust, ARM Cortex M, and a Generated HAL▲137
2016 · jamesmunns.com · its alternatives →
9VS
Visual Studio Code for Chromebooks and Raspberry Pi (Native ARM/ARM64)▲6
2019 · headmelted.com · its alternatives →
10M
MiRemoteBridge▲56
a $5 build that lets a Bluetooth remote run your PC
Sep 2026 · qyhhhh.github.io · its alternatives →
11
BlastEm – A highly accurate and moderately fast Genesis/MD emulator▲6
2017 · retrodev.com · its alternatives →
12AX
An x86 assembly game from 2002, ported to WebAssembly with Claude Code▲6
Feb 2026 · particlefield.com · its alternatives →
13WA
Writing an Emulator in Go▲8
2018 · gyani.net · its alternatives →
14MW
Microcontroller with hardware-accelerated Lua VM▲8
Still a bit of a WIP, but getting there... Any feedback appreciated :)
2025 · brisbanesilicon.com.au · its alternatives →
15
Run, learn, and debug x86-64 Assembly code directly from your browser▲12
I recently created this project to teach assembly, and to have an assembly playground in the style of codepen/jsfiddle to embed in my blog posts. It's based on a wasm version of the blink x86-64 emulator, so everything runs client side with no backend server and with a runtime of only ~200Kb
2024 · x64.halb.it · its alternatives →
16
Realtime OS for Cortex-M0 Under 1K Bytes▲6
2019 · github.com · its alternatives →
17
I built a web-ready synthesizer using WebAssembly and C++▲6
2020 · youtu.be · its alternatives →
18IP
I ported my Tetris built with SDL2 to WebAssembly▲5
2023 · olzhasar.github.io · its alternatives →
19TT
Tool to Remotely Install, Update, and Monitor Embedded Devices▲5
2024 · voyonic-systems.de · its alternatives →
20GO
Getting Our Hardware MVP to Real Users▲7
2014 · blog.wearewired.in · its alternatives →
21
Introduction to embedded ARM programming with libopencm3▲5
Starting from scratch: deploying blinky on a baremetal STM32
2018 · rhye.org · its alternatives →
22AR
Ast.run – WebAssembly playground▲9
2016 · ast.run · its alternatives →
23WR
WebFPGA – Rapid FPGA Development for Beginners▲8
2019 · kickstarter.com · its alternatives →
24CT
C to WebAssembly in JavaScript▲6
2017 · maierfelix.github.io · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →