OnlinePy

Spec sheet

Purpose

OnlinePy is a Python IDE that runs code in the browser without installation or an account.Read 11 Oct 2026 · onlinepy.com

Audience

The homepage lists testing snippets, learning Python, data analysis, coding interview preparation, and teaching as use cases.Read 11 Oct 2026 · onlinepy.com

Free plan

YesRead 23 Sep 2026 · onlinepy.com

Code history

The homepage describes automatic logging of runs and one-click rollback to an earlier point.Read 11 Oct 2026 · onlinepy.com

Deployment options

noneRead 23 Sep 2026 · onlinepy.com

Embedding

OnlinePy can be embedded using a floating widget, JavaScript custom element, or iframe, with configurable visible features.Read 11 Oct 2026 · onlinepy.com

Embedding limitation

In an iframe without cross-origin isolation, code can still run, but interactive input() and Stop are limited.Read 11 Oct 2026 · onlinepy.com

Full-stack runtime

NoRead 23 Sep 2026 · onlinepy.com

Image export

Users can export code with syntax highlighting and terminal output as an image.Read 11 Oct 2026 · onlinepy.com

Libraries

It supports NumPy, Pandas, Matplotlib, SciPy, and scikit-learn through Pyodide.Read 11 Oct 2026 · onlinepy.com

Local execution

Code executes locally in the browser using WebAssembly, and the maker says code stays on the device unless the user uses Share.Read 11 Oct 2026 · onlinepy.com

Maker details

The About page identifies the product as OnlinePy but does not state a maker name, headquarters, or founding date.Read 11 Oct 2026 · onlinepy.com

Memory

The site advertises up to approximately 4GB of WebAssembly heap.Read 11 Oct 2026 · onlinepy.com

Mobile support

The maker says OnlinePy works in modern mobile browsers and recommends desktop or laptop for the best experience.Read 11 Oct 2026 · onlinepy.com

Offline use

The About page says that after the initial Pyodide runtime download, subsequent visits can work offline from cache.Read 11 Oct 2026 · onlinepy.com

Package installation

The maker says most pure Python packages on PyPI can be installed at runtime.Read 11 Oct 2026 · onlinepy.com

Platform

OnlinePy is described as browser-based; no native desktop or mobile app is identified on the pages opened.Read 11 Oct 2026 · onlinepy.com

Private projects

YesRead 23 Sep 2026 · onlinepy.com

Sharing controls

link_accessRead 23 Sep 2026 · onlinepy.com

Plans and prices

Every OnlinePy plan and price →

Where Specifiction places it

• Coding Playgrounds#79 of 1387.8