A desktop operating system written in pure HTML + CSS + JavaScript that runs entirely in your browser. Fluent Design style, full boot / lock / login / desktop flow. Zero frameworks, zero dependencies.
Not just another web page — a complete desktop environment that runs in your browser.
Boot → resource preload → onboarding → lock screen → PIN login → desktop. A coherent experience.
Mica acrylic, rounded corners, soft shadows and smooth motion. One-click light / dark theme.
Drag, resize, maximize, snap, task view and app switching. Window positions are remembered.
Files, Settings, Terminal, Browser, Calculator, Photos, Media, Weather — out of the box.
No npm, no bundler, no framework. Open and run. Blazing fast.
Settings, layout, files and sessions all live in your own browser.
These apps are pre-installed and available from the desktop and Start menu.
Files
Settings
Terminal
Browser
Calculator
Clock
Weather
Camera
Photos
Media
Notes
App Store
Task Mgr
TipsNyouOS is open source under GPLv3. Clone, star, open issues and send PRs.