To resize an image, before uploading to the website, open the Photos app and choose the picture from your library that you want to resize.
Or, you can open File Explorer and right-click the image you want and choose Photos from the “Open with” option.
1. Once the image is displayed in Photos, click the See More ( 3 dots: •••) button on the Top-Right of the screen
2. Choose the Resize option form the menu.
Windows Photo App Resizing Photos
3. Click/tap on S (small), M (medium), L (large), or C (custom) for the size you want to resize the image with.
* Small is recommended to upload to a general information page on your website.
4. Navigate to where you want to save the resized image, type a name you want for the image, and select Save.
Now the photo is ready to be uploaded to your website.