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JavaScript Notebook

Experiment with JavaScript in a free, login‑free, browser‑based notebook, compiler and editor. Supports HTML, CSS, Markdown, AI/ML libraries and GitHub sync.

FreeWebPricing checked: Sep 12, 2026
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Best for

Front-end developers, educators, and data visualization specialists prototyping JavaScript code, experimenting with DOM manipulation, and sharing reactive notebooks.

Things to know

Client-side computation only; heavy backend Node.js APIs or persistent server databases are not supported directly in the browser environment.

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About this tool

Overview

Scribbler lets you write, run, and share JavaScript code instantly in a browser‑only notebook. No login, no installations, and full support for HTML, CSS, Markdown, and external libraries.

No Login Required

Start coding immediately without accounts or sign‑ups; all data stays client‑side unless you push to GitHub.

Device Agnostic UI

Minimalist, mobile‑responsive interface works on desktops, tablets, and phones in any modern browser.

Dynamic CDN Library Loading

Add any ES‑6 library from popular CDNs on the fly, enabling AI/ML, plotting, and scientific packages.

JS+HTML+CSS+Markdown

Create full‑stack notebooks combining JavaScript, HTML, CSS, and Markdown for interactive documentation.

Get started

  1. Open the official website and confirm the service is available in your region.
  2. Check the current plan, usage limits and terms for your intended use.
  3. Try a small task with sample data before committing to a paid plan.

Editorial note

Pricing checked: Sep 12, 2026. Free and open-source browser-based JavaScript notebook and live runtime environment. Code executes 100% client-side with no sign-up, tracking, or hosting fees.

Record updated: Sep 12, 2026

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