Sandbox.js - Run user code in a sandboxed environment
Sandbox.js - Run user code in a sandboxed environment launched on December 1, 2012 with 31 votes, #64 of 501 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 13 years on.
In plain words
Sandbox.js is a developer tool that executes user-submitted code in an isolated environment. Launched in 2012, it prevents untrusted code from accessing the host system or causing unintended side effects. The tool is designed for developers who need to safely run code from multiple sources—such as in educational platforms, code challenge sites, or collaborative development environments—without security risks.
written from the facts on this page · September 2026
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I've been making JavaScript sandbox alone for 6 years2022 · playcode.io · ▲397Hi HN! Thanks for your attention to my post. It was a big challenge to run most of Node.js packages in browser, fast moreover. Virtual File system, resolve import/export. I got cold many times, depressions, burned out, yet still alive and finished it. Many guys helped me with an advice. Many users give a lot of positive feedback. There are 200,000 monthly unique users. I work full time now because of the freemium business model. To be honest - I am happy after many years of hard work.
Execute JavaScript in a WebAssembly QuickJS sandbox2024 · github.com · ▲206This 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…
- RURun unsafe user generated JavaScript in the browser2022 · workerbox.net · ▲113
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
Sandworm Cloud Edition2023 · sandworm.dev · ▲326Keep your JavaScript code secure and compliant with Sandworm
Sandpack by CodeSandbox2021 · sandpack.codesandbox.io · ▲211Toolkit for building live coding experiences in browser

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