Raspberry Pi OS (previously called Raspbian) is our official operating system for all models of the Raspberry Pi.
Use Raspberry Pi Imager for an easy way to install Raspberry Pi OS and other operating systems to an SD card ready to use with your Raspberry Pi:
Download imager for:
Download Easy installer NOOBS
NOOBS is an easy operating system installer which contains Raspberry Pi OS and LibreELEC. It also provides a selection of alternative operating systems which are then downloaded from the internet and installed.
Download Raspberry Pi OS (Raspbian)
Raspberry Pi OS comes pre-installed with plenty of software for education, programming and general use. It has Python, Scratch, Sonic Pi, Java and more.
The Raspberry Pi OS with Desktop image contained in the ZIP archive is over 4GB in size, which means that these archives use features which are not supported by older unzip tools on some platforms. If you find that the download appears to be corrupt or the file is not unzipping correctly, please try using 7Zip (Windows) or The Unarchiver (Macintosh). Both are free of charge and have been tested to unzip the image correctly.