pxt.microbit.org requires that you use a recent version of a modern browser, such as Microsoft Edge, Google Chrome, Mozilla Firefox, Safari, Opera, or IE11. This is because the editor uses modern web technologies such as web workers to enable compiling TypeScript in the browser, or the using the same Monaco editor that powers Visual Studio Code.
Most modern browsers automatically update themselves, but in some environments such as schools these automatic updates are disabled for security. We strongly recommend that you use the most recent version of any of these browsers, but if you can’t then you must use at least:
| Browser | Minimum version | Release date | Windows | Mac |
|---|---|---|---|---|
| Edge | 12 | March 2015 | Windows 10+ | N/A |
| Internet Explorer | 11 | October 2013 | Windows 7+ | N/A |
| Mozilla Firefox | 31 ESR | July 2014 | Windows XP+ | OS X 10.6+ |
| Google Chrome | 38 | October 2014 | Windows XP+ | OS X 10.6+ |
| Safari | 9 | September 2015 | N/A | OS X 10.9+ |
| Opera | 21 | May 2014 | Windows 7+ | OS X 10.9+ |
Please see our information for which browsers are recommended for Windows, Mac, Linux, or Raspberry Pi.