Just used it to save a couple of images that would've otherwise been in WebP format, and they were instead saved as PNGs. Works.

Edit: I just realized I posted a review for this extension 6 years ago. I've been using this ever since then and I want to give a genuine thanks to the creator for making such an easy-to-use, free, reliable extension such as this one. Even though Microsoft *finally* added native support for WebP images in the last year or so, I'll continue to use this as my go-to to avoid any WebP shenanigans sites continue to throw at me. Thank you so much.