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RunJS

Little Paxton, St. Neots, United Kingdom

Plans and prices

Lifetime License

Priced on request

macOS, Windows, Linux · 2 devices · updates forever, including major releases · 30-day money-back guarantee

Perpetual License

Priced on request

macOS, Windows, Linux · 2 devices · updates for 1 year · 30-day money-back guarantee

Every plan, in full

On the record

AI integrations
AI Chat can connect to OpenAI, Anthropic, Gemini, Mistral, or a local model served by tools such as Ollama.runjs.app · read 4 Oct 2026
AI key handling
RunJS says AI API keys are stored locally and used only to authenticate requests to the selected provider.runjs.app · read 4 Oct 2026
Code snippets
Users can save reusable snippets and import or export them as JSON files.runjs.app · read 4 Oct 2026
Debugging
Logpoints print values from selected lines without changing source code or adding console.log calls.runjs.app · read 4 Oct 2026
Education licenses
Eligible students and teachers can request a free full license with one year of updates, intended for learning and teaching rather than commercial work.runjs.app · read 4 Oct 2026
License limit
A paid license can be active on up to two devices at the same time.runjs.app · read 4 Oct 2026
NPM packages
The NPM Packages tool installs libraries from the npm registry for use without setting up a project on disk.runjs.app · read 4 Oct 2026
Privacy
The privacy policy says RunJS does not sell, rent, or loan identifiable customer information and describes its personal-data use as GDPR-compliant.runjs.app · read 4 Oct 2026
Runtime environments
RunJS includes Node.js and browser environments for experimenting with code and browser APIs.runjs.app · read 4 Oct 2026
Support
The creator says support questions go directly to him, and education license applicants usually hear back within a day or two.runjs.app · read 4 Oct 2026
What it does
RunJS is a desktop scratchpad for rapidly prototyping JavaScript and TypeScript, with code results shown alongside the editor.runjs.app · read 4 Oct 2026
Who it is for
RunJS describes use by developers prototyping and debugging, and by teachers and students learning to code.runjs.app · read 4 Oct 2026

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