While non-Windows users can simply download the ISO from the Windows 10 download page, but the Windows users can’t as it makes you download the media creation tool instead. So, to be able to download the ISO directly, we’ll make the Microsoft website think that you’re using a non-Windows device.
To do that, install the User Agent Switcher extension for Chrome ( you can install a similar extension in Firefox if you use that). Once installed, just open it and select any non-Windows user agent, I used Chrome on Ubuntu. Now head over to the Windows 10 download page and you’ll have the option to directly download the desired Windows 10 ISO file instead of the media creation tool.
It is worth noting that the link is valid for 24 hours only.