Dev tools · alternatives · 2026
24 alternatives to Run, learn, and debug x86-64 Assembly code directly from your browser
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
This is a browser-based x86-64 assembly playground that allows users to write, run, and debug assembly code directly in their browser. Built on a WebAssembly version of the Blink emulator, it requires no backend server… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Run, learn, and debug x86-64 Assembly code directly from your browser launched in 2024; newer entries below may have overtaken it.
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Run KolibriOS, Linux or Windows 98 in your browser
2013 · copy.sh · its alternatives →
- 2
Write and learn assembly code from your browser
2025 · x64.halb.it · its alternatives →
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This is the entire Firefox browser rendering to a element. Gecko, all UI components, and the Spidermonkey JS engine are all compiled and running in WebAssembly. Here are a few things you might find interesting: - This is fully end to end encrypted! We use the WISP protocol for TCP-over-websockets. - There is a novel WASM->JS JIT for experimental site speedup - This port cost over 25k in opus/fable tokens for debugging and JIT research This was just a fun experiment to push the boundaries of WebAssembly. For a more usable "browser in browser" experience, we also built…
Jul 2026 · developer.puter.com · its alternatives →
- 4GP
2021 · go-playground-wasm.vercel.app · its alternatives →
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Run WebAssembly made for outside the browser, inside the browser.
2022 · runno.dev · its alternatives →
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I've open sourced a JavaScript to WASM compiler. It's an experimental tool, but given the semantics I already implemented, I'm fairly certain I am able to eventually cover 100% of JavaScript spec. Any ideas, questions or critique welcomed! If you are interested in WASM, especially with new proposals like WASM GC or exception handling, it might be a good source of seeing these features in action - the project has a few thousand lines of hand written WAT so far.
2024 · github.com · its alternatives →
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Learn how classic game hardware worked. Write code and see it run instantly.
2016 · 8bitworkshop.com · its alternatives →
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Run KolibriOS, Linux or Windows 98 in your browser
2022 · copy.sh · its alternatives →
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Hello, World! written in seemingly "gibberish" x86 assembly using obfuscation on the assembly and machine code -level - phoreverpheebs/gibberish
2023 · github.com · its alternatives →
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Show HN: TinyWasm - A tiny WebAssembly Runtime written in Rust Hi HN! I'm excited to share TinyWasm (https://github.com/explodingcamera/tinywasm), a WebAssembly Interpreter I developed for my final university project. The main goal of this project was to deepen my understanding of WebAssembly and interpreter design. TinyWasm successfully passes all the official WebAssembly 1.0 tests and also includes features from future proposals such as like bulk memory operations. Initially more of a research project, TinyWasm focuses on simplicity and portability. It has minimal…
2024 · github.com · its alternatives →
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This TypeScript package allows you to safely execute JavaScript code within a WebAssembly sandbox using the QuickJS engine. Perfect for isolating and running untrusted code securely, it leverages the lightweight and fast QuickJS engine compiled to WebAssembly, providing a robust environment for code execution. Features - *Security*: Run untrusted JavaScript code in a safe, isolated environment. - *File System*: Can mount a virtual file system - *Custom Node Modules*: Custom node modules are mountable - *Fetch Client*: Can provide a fetch client to make http(s) calls - *Test-Runner*: Includes…
2024 · github.com · its alternatives →
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Generate x86 Assembly with Go. Contribute to mmcloughlin/avo development by creating an account on GitHub.
2019 · github.com · its alternatives →
- 13AP
2015 · fatiherikli.github.io · its alternatives →
- 14
Linux virtual machine, running in the browser via HTML5/WebAssembly. Networking and graphics supported.
2021 · repl.leaningtech.com · its alternatives →
- 15MP
I have been working on this game somewhat sparsely for the past three years or so. However, it is still in a very early stage, and there is a lot of work to do. One of my friends encouraged me to post about it here, since he felt people might find interesting how I don’t use any libraries for it. The game can be played on a browser by virtue of WebAssembly. There are native ports using either MiniFB or SDL2, but you have to build those yourself. I decided to write the game in C because I feel like it is a simple language that a lot of people can understand well enough, and I didn’t think I…
2023 · zamfofex.neocities.org · its alternatives →
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Hi HN! Korean high school senior here, about to start CS in college. I built a browser engine from scratch in C++ to understand how browsers work. First time using C++, 8 weeks of development, lots of debugging—but it works! Features: - HTML parsing with error correction - CSS cascade and inheritance - Block/inline layout engine - Async image loading + caching - Link navigation + history Hardest parts: - String parsing(html, css) - Rendering - Image Caching & Layout Reflowing What I learned (beyond code): - Systematic debugging is crucial - Ship with known bugs rather than chase…
Jan 2026 · github.com · its alternatives →
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I am super excited to open-source the code executor behind logicboard.com - an in-browser collaborative code editor. The backend is written in Elixir+Phoenix and implements a WebSocket API to execute code in docker containers. Next steps include making this more secure, I am considering Google's gVisor to implement better isolation between containers and the host kernel.
2023 · github.com · its alternatives →
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I made a little emacs minor mode for connecting assembly code and assembled code buffers I'm really fascinated by the idea of demystifying an operating system, so to be able to view the alignment between code and data I find really satisfying
2024 · github.com · its alternatives →
- 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 →
- 20
Earlier this year, we released our open-source game engine [0] built with Rust, WebAssembly, and WebGPU. Today, we’re happy to announce the Ambient platform, which brings web deployment, server hosting, and more to the runtime. With Ambient, you can make a game, deploy it to the browser in one command, share your URL and instantly play with others, no downloads or installs needed. Our WASM use is innovative; it is being used as both a sandboxed runtime for user code, and as a way to run the entire Ambient runtime in the browser. This, paired with our ECS data model, enables a highly modular…
2023 · ambient.run · its alternatives →
- 21
I built a tiny 8-bit CPU simulator in Python to better understand how computers work at a low level. It visualizes registers, memory, and instructions in real-time, so you can actually see each operation as it happens. You can write simple assembly code and watch how the CPU executes it step by step. The project is mainly for learning and experimentation, but I’d love feedback or ideas for improvement.
Oct 2025 · github.com · its alternatives →
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As a personal project I wrote a really tiny Wat 2 Wasm compiler in Go. Mainly for demonstrative and educational purposes. It was tough: I didn't know anything about WebAssembly internals and I'm a newbie with Go... so I tried to document it as much as I could for anyone that would like to approach the quest in the future! It misses a lot of features (that will be gradually implemented). Any feedback is welcomed!! Demo: https://luna-demo.vercel.app
2022 · github.com · its alternatives →
- 23IM
I made a Logicboard.com — A collaborative code editor with code-replay feature. Code-replay lets you run the coding session like a movie, I wrote a blog post on how I implemented this: https://logicboard.com/blog/code-replay You can try out the demo here: https://logicboard.com/demo/:replay And play around with the code editor here: https://logicboard.com/demo/ Logicboard also has an REPL shell, just type "start()" and hit enter in the output area.
2023 · logicboard.com · its alternatives →
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🐹🕸️ WebAssembly runtime for Go. Contribute to wasmerio/wasmer-go development by creating an account on GitHub.
2019 · github.com · its alternatives →
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