Why convert PNG to WebP
If you are putting images on a website, this is usually the conversion worth making. WebP keeps the alpha channel that PNG has, so logos and cut-outs still work, while producing a noticeably smaller file. Smaller images mean faster pages, which affects both what visitors experience and how search engines assess the page. Every current browser has supported WebP for years, so the compatibility argument against it has largely expired.
What this conversion costs you
- Older software may refuse it. Anything built before roughly 2020 — older desktop image viewers, some print workflows, older Office versions — may not open a WebP at all. This is the only real reason to hesitate.
- Nothing visible at default quality. Transparency is preserved and the picture is re-encoded at high quality. On screen the two are very hard to tell apart.
When not to do this
Do not convert if the file is going to a print shop, a government upload form, or anyone whose software you cannot verify. In those places PNG or JPG remains the safer currency.
Common questions
Is WebP smaller than PNG?
Substantially, yes — commonly around 30 percent smaller for the same image, and often more for photographic content, while still supporting transparency.
Do all browsers support WebP?
Every current browser does, including Safari, Chrome, Firefox and Edge. Support outside browsers, in desktop and print software, is where gaps remain.
Does WebP keep transparency?
Yes. WebP supports an alpha channel just as PNG does, so transparent backgrounds survive the conversion intact.