Convert the images on a page to WebP without leaving it

WebP, JPEG and PNG, or Auto, which picks per image. Quality defaults to 80 and you can move it either way before running the batch.

If you want it to. Leave images at their original size, or fit them to the size they're actually displayed at, or to twice that so they still hold up on a retina screen. That last one is the default, because it's the setting that shrinks a page most without anyone noticing.

The original and optimized totals sit side by side while the batch runs, so you can see what the page would weigh either way. Optimized images are swapped into the page as they finish, which means you're looking at the compressed version at the quality you picked rather than guessing from a number.

Save All collects everything it optimized into a single ZIP and downloads it, so you can drop the results straight into your own build.

No. The swap happens in your browser, on your copy of the page, and it's gone on reload. Nothing is uploaded and nothing is written back to the server, so you can try WebP on a client's production site and see the result before anyone commits to shipping it.

Assets is for getting files off a page: it lists every image, SVG, video, PDF and Lottie file and lets you download them. This is for making the ones already there smaller. The Assets panel has its own page if pulling files is what you're after.

Yes. Every tool runs in the Firefox build; it carries an experimental label because Chromium gets fixes and new features first. Chrome is the fully supported browser, along with Chromium forks like Edge and Brave.

It's one of Hoverify's tools rather than a standalone product. Hoverify is paid with a 14-day refund behind it, so run it over a few real pages and decide from that. The refund is what stands in for a trial. One license runs in 3 browsers at a time, and nothing auto-renews. See the pricing.