In this tutorial you will learn how to download Windows 10 ISO directly from Microsoft without having to download or use Windows Media Creation tool in order to get the ISO file.
Step 1 - Go to
https://www.microsoft.com/en-us/software-download/windows10ISO
Step 2 - Open developer tools on chrome(Ctr+Shift+I)
Once you have opened developer Click to the customize button (three vertical dots)

Step 3 - Go to More Tools and then on Network Conditions

Step 4 - Change browser agent to "Chrome Os"
Uncheck the box " Use browser default" and then select Chrome OS on the drop down box

Once you have selected "Chrome Os" as browser user agent reload the microsoft page and it should show you the options to directly download the ISO file.
Step 5 - Select Windows edition

Step 6 - Choose language

Step 7 - Choose Windows 10 version

Once you click the download button the links will be available for 24 hours, so make sure to download the ISO within 24 hours.
Then you can use any software to make a bootable usb or dvd with the iso file that you downloaded.
Conclusion
That's it! By now you should know how to download Windows 10 ISO directly from Microsoft website without having to download and install windows media creation tool.