This one's for the site owners. If you're converting PNG to WebP, you're almost certainly trying to make web pages faster — and it works: for typical images, WebP lands 25–70% smaller than the PNG it replaces at visually identical quality. Multiply that across every image on a page and it's often the single cheapest performance win a site can get, with Core Web Vitals and search rankings feeling the benefit.
Transparency survives. This is the detail that matters most for the classic use cases — logos, icons, product images on transparent backgrounds. WebP supports full alpha transparency, so unlike a PNG→JPG conversion nothing gets flattened onto white. What was transparent stays transparent, in a fraction of the bytes.
Browser support stopped being a question years ago. Every current browser — Chrome, Safari, Firefox, Edge, and everything mobile — renders WebP natively. The old advice about needing PNG fallbacks for Safari is dead; unless you're supporting genuinely ancient corporate machines, you can serve WebP alone with a clear conscience.
About the quality setting: the default here is 82%, which is the sweet spot for web use — files shrink dramatically while artifacts stay imperceptible at normal viewing sizes. Screenshots and UI images with sharp text edges are the ones to watch; if you see fuzzing on fine text, nudge the quality up in the options and re-convert. The honest before/after byte counts are shown for every file, so you're never guessing what a setting cost or saved you.
Batch is the point. Redoing a site's image folder means dozens of files, so drop them all at once — each converts independently with its own progress and size readout, and one click ZIPs the lot. Everything happens inside your browser: your images never upload anywhere, there's no queue and no per-file pricing, and the page works offline. For a designer handling client assets under NDA, that's not a convenience — it's the reason to use this converter over the upload-based ones.
Going the other way — a WebP you need to open in an old editor? The reverse converters are linked below.