RunJS is a B2B product built for javaScript developers, learners, and technical prototypers.

Yes — there is a free tier, with paid plans for advanced use.

What platforms does RunJS run on?

RunJS runs on the web, macOS, Windows, and Linux.

Is RunJS still maintained?

The GitHub repository shows 10 commits in the last 90 days.

Is RunJS open source?

RunJS has a public GitHub repository.

Back to the index

RunJS

Name: RunJS
Author: RunJS

runjs.appIDEs & code editors

RunJS is a desktop JavaScript playground that evaluates code as it is typed using built-in Node.js and browser environments. It supports npm package installation, live prototyping, value inspection, logpoints, AI chat, and reusable snippet libraries for developers and learners.

FreemiumWebmacOSWindowsLinux

Visit runjs.app

2.2kstars

53forks

10features

2018since

Overview

10 features

RunJS is an IDEs & code editors project. It focuses on experimenting with JavaScript, Node.js, browser APIs, and npm packages without creating a project or configuring a development environment. RunJS is a B2B product aimed at javaScript developers, learners, and technical prototypers. There is a free tier. RunJS is available on the web, macOS, Windows, and Linux.

It is developed by RunJS, and it first shipped in 2018. Development happens publicly on GitHub with 2.2k stars and 10 commits in the last 90 days. Among its 10 catalogued features are live evaluation, node.js environment, and browser environment. It exposes integrations via a public API.

Summary written by a language model from the project’s public pages.

Live evaluation
Node.js environment
Browser environment
npm packages
Snippet library
Magic comments
Logpoints
Value inspection
Code generation
AI chat

Built with & integrations

Framework

Next.js

Hosting

Netlify

Connectors

API

Runs on

BrowsermacOSWindowsLinux

Detected from

Next.js: x-powered-by header · /_next/static/ in the HTML
Netlify: x-nf-request-id header

Trust & compliance

Verified signals

HTTPSPrivacy Policy Terms of ServiceFree tierGitHub · ★ 2.2kActive maintenance

Legal

Indexing history

What PulseGate has recorded for this listing

Indexed3 Sep · 10:31 UTC
Music Theory for Programmers verified via Hacker News firehose (Algolia)
Source: Hacker News firehose (Algolia) · Open
Indexed22 Aug · 08:19 UTC
Music Theory for Programmers verified via Hacker News firehose (Algolia)
Source: Hacker News firehose (Algolia) · Open
Indexed20 Aug · 16:24 UTC
Music Theory for Programmers verified via Hacker News firehose (Algolia)
Source: Hacker News firehose (Algolia) · Open

Frequently asked questions about RunJS

What is RunJS?: RunJS focuses on experimenting with JavaScript, Node.js, browser APIs, and npm packages without creating a project or configuring a development environment. It is catalogued under IDEs & code editors on PulseGate.
Who is RunJS for?: RunJS is a B2B product built for javaScript developers, learners, and technical prototypers.
Is RunJS free?: Yes — there is a free tier, with paid plans for advanced use.
What platforms does RunJS run on?: RunJS runs on the web, macOS, Windows, and Linux.
Is RunJS still maintained?: The GitHub repository shows 10 commits in the last 90 days.
Who develops RunJS?: RunJS is developed by RunJS.
How long has RunJS been around?: RunJS first shipped in 2018.
Is RunJS open source?: RunJS has a public GitHub repository.

At a glance

Pricing: Freemium · pricing page detected · free tier
Platforms: Desktop · Web
Languages: English
Open source: Yes · ★ 2.2k
First seen: 20 Aug 2026
Built for: JavaScript developers, learners, and technical prototypers
Model: B2B
Solves: Experimenting with JavaScript, Node.js, browser APIs, and npm packages without creating a project or configuring a development environment.

Registered as

GitHub: lukehaas/RunJS

Developer

Small team

GitHub

Open source

View on GitHub

Stars: 2,167
Forks: 53
Open issues: 58
Last commit: 13 Jul 2026
Commits 90d: 10
Contributors: 5
Authorship: Small team
Default branch: master
Latest release: v4.1.0 · 7 Jul 2026

Index record

Indexed: 20 Aug 2026
Lifecycle: Alive
First seen: Aug 2026
Last seen: 3 Sep 2026

Identity audit (13)

Slug: music-theory-for-programmers-runjs-app
Lifecycle last checked: 8 Sep 2026
Verification state: Indexed for public listing
Listing state: Listed: yes
Index status: Included in index
Latest evidence snapshot: 3 Sep 2026
Timeline basis: Indexed-at chronology (no inferred launch/funding milestones).
Name from: Derived from the project's own page and URL.
Category from: Assigned by a language model.
Summary from: Written by a language model from public pages.
Languages from: Detected by a language model, checked against the page's own declaration.
Last updated: 3 Sep 2026
Canonical URL: https://runjs.app/

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