Dev tools · alternatives · 2026
24 alternatives to Online JS Compiler
Run JavaScript instantly in your browser - no setup needed
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
- 2RU
I needed a way to let users write JavaScript to create plugins for a site I'm building. I couldn't find a solution I was happy with, so ended up building one that run's it in a web worker on a separate domain from your main site. Hopefully I haven't missed anything. If so, please let me know! My website has an interactive demo you can write code in the browser textarea, and see the output on the right. Interactive Demo: https://workerbox.net/ Github: https://github.com/markwylde/workerbox
2022 · workerbox.net · its alternatives →
- 3IW
2011 · hildr.luminance.org · its alternatives →
- 4
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 →
- 5
Learn JavaScript is the easiest, most interactive way to learn & practice modern JavaScript online. Read short lessons, solve challenges & answer flashcards.
2019 · learnjavascript.online · its alternatives →
- 6SU
2022 · npmjs.com · its alternatives →
- 7JL
http://instantclick.io/ It seems the internet architecture won't bring us instant websites anytime soon. So here is a hack. I released this JS library last month (today is version 2.0 release, fixing v1.0's rough edges), it makes use of HTML5's pushState and preloading to make a website instant. It works like this: before clicking on a link, you'll hover over it. And there's a delay of 200-300 ms between these two events. InstantClick uses this delay to preload a page, when you click on a link it will display instantly in most case. (You can test on the website.) That's…
2014 · its alternatives →
- 8
Online Java compiler (Editor/Interpreter)
2024 · almabetter.com · its alternatives →
- 9
Code Instantly. No Setup Required.
Jan 2026 · coderunnerpro.site · its alternatives →
- 10
- 11
Faster user-land reimplementations for several common builtin native JavaScript functions. - codemix/fast.js
2014 · github.com · its alternatives →
- 12
faster.js is a Babel plugin that compiles idiomatic Javascript to faster, micro-optimized Javascript. - vzhou842/faster.js
2018 · github.com · its alternatives →
- 13MT
2013 · teamten.com · its alternatives →
- 14
Write, run, and test JavaScript snippets & JSON offline
Aug 2026 · chromewebstore.google.com · its alternatives →
- 15CT
2015 · duoco.de · its alternatives →
- 16
Online html, css/scss, and javascript compiler
2025 · compiler.toolaska.com · its alternatives →
- 17
Write your own compiler: introduction. Code genetation. AST. Abstract syntax tree. lisp. javascript.
2017 · blog.klipse.tech · its alternatives →
- 18
JavaScript.com▲217A free resource for learning and developing in JavaScript
2015 · javascript.com · its alternatives →
- 19
- 20AC
2018 · npmjs.com · its alternatives →
- 21WG
I built a Vite plugin that lets you write Go code directly in .js files using a "use golang" directive. It compiles to WebAssembly automatically.
Oct 2025 · npmjs.com · its alternatives →
- 22
- 23
Minimal self-hosted JavaScript compiler in 1k lines of code - maierfelix/mini-js
2017 · github.com · its alternatives →
- 24
QuickBEAM is a JavaScript runtime embedded inside the Erlang/OTP VM. If you’re building a full-stack app, JavaScript tends to leak in anyway — frontend, SSR, or third-party code. QuickBEAM runs that JavaScript inside OTP supervision trees. Each runtime is a process with a `Beam` global that can: - call Elixir code - send/receive messages - spawn and monitor processes - inspect runtime/system state It also provides browser-style APIs backed by OTP/native primitives (fetch, WebSocket, Worker, BroadcastChannel, localStorage, native DOM, etc.). This makes it usable for: - SSR…
Mar 2026 · github.com · its alternatives →
Also compare
- www.tpointtech.com alternatives
- Run unsafe user generated JavaScript in the browser alternatives
- I wrote a .NET to JS compiler. Here's an XNA demo compiled to JS. alternatives
- Execute JavaScript in a WebAssembly QuickJS sandbox alternatives
- Learn and practice modern JavaScript alternatives
- Speed up your site by running JavaScript when the browser is idle alternatives
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 →