No. Microsoft distributes Windows through the Media Creation Tool (for Windows 8.1, 10, and 11) or through official MSDN/VLSC ISOs. These are standard, uncompressed images meant to be written directly to a USB drive or DVD.
However, there is one legitimate method to get a smaller official file: windows 8 iso highly compressed 2021
By 2021, mainstream support for Windows 8 had ended (support stopped in January 2018). Security updates ceased long ago. Installing an original Windows 8 ISO—compressed or not—means exposing your hardware to hundreds of known vulnerabilities (EternalBlue, BlueKeep, etc.) that modern antivirus can only partially block. However, there is one legitimate method to get
Windows 8 (original version, not 8.1) lost security updates years ago. By 2021, any "new" Windows 8 ISO would contain all the unpatched exploits from 2012–2017. If you install it, you are inviting ransomware, worms, and backdoors onto your machine the moment you connect to the internet. Windows 8 (original version, not 8