jsos

JSOS – A JavaScript Operating System in Your Browser

JSOS is a fully functional, browser-based operating system built with vanilla JavaScript. It boots through a BIOS and bootloader, drops you into a terminal, and saves your files and settings using your browser’s storage with no installs, no build tools.

Play in your browser

• Hosted build: https://theangryhermit.github.io/jsos
• Source code: https://github.com/TheAngryHermit/jsos
  

What’s inside

• BIOS setup (press F2 during boot) with boot order, secure boot, virtualization, and SATA mode options
• Persistent virtual filesystem (LocalStorage/IndexedDB) that survives reloads
• Unix-style terminal with navigation and file ops (cd, ls, mkdir, rm, cp, mv, cat, tree)
• Process scheduler and basic memory reporting
• Pure browser experience: open the page and it runs

How to run

1. Open the hosted build, or
2. Download from below and open index.html in your browser

Persistence

• Files and BIOS settings are saved automatically in your browser
• 'reset' clears all saved data and restores defaults

Browser requirements

• Modern browser with ES6, LocalStorage, and IndexedDB (Chrome/Edge 90+, Firefox 88+, Safari 14+)

Tips

• Press F2 during the boot window for BIOS setup
• Type help in the terminal for the command list