All labs · 🌐 Web Lab
Build for the web
HTML is the page, CSS the style, JavaScript makes it do things – and Flask turns Python into a real web app. Everything runs here in your browser.
👋 Free demo: try the first 2 lessons and the first tool. Subscribe to unlock everything here and in all the other labs – USD 10 a month (USD 100 a year), or included with lessons.
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Build anything: the page updates as you type. Start from an idea:
HTML
CSS
JavaScript
Console console.log(...) shows here
A real Flask app running in Python in your browser. Change the code, press Run, then click around your site in the mini browser.