Why you end up with WEBP files
Many websites now send images as WEBP so pages load faster, which means saving an image from your browser often gives you a .webp file. It looks fine in the browser, but older image viewers, word processors and some upload forms don't accept WEBP.
PNG or JPG?
- PNG: images with transparency, or logos, icons and screenshots where crisp edges matter.
- JPG: photos with lots of color that you want to send as small files. Switch the format to JPG above.
It is normal for the file to get bigger when going from WEBP to PNG. WEBP is simply that efficient.
Check the copyright too
Images saved from the web usually belong to whoever made them. Changing the format doesn't make them free to use, so unless it is for personal viewing, check the license or ask for permission.