PNG to WebP Converter
Convert PNG images to WebP format for smaller file sizes. No upload, no watermark, no signup. 100% private and free.
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Usually the right conversion to make
WebP does everything PNG does and does it smaller. It has a real alpha channel, it handles both flat colour and photographic content, and it typically lands at a quarter to a third of the PNG's size at quality you cannot tell apart.
If you are putting images on a website and you are still shipping PNG, this is the single easiest size win available.
Transparency survives
This is what separates it from converting to JPG. WebP stores alpha properly, so a logo with a transparent background keeps it and comes out smaller than the PNG did. Converting the same logo to JPG would fill the background with white.
More detail
Lossy by default, and that is fine
The quality setting applies here, unlike PNG output where it is ignored. At 0.85 the result is visually identical to the source for almost anything, at a fraction of the size.
The exception is an image you will edit repeatedly. Each lossy save compounds the previous one, so keep a PNG or the original master somewhere and convert to WebP as the last step before publishing.
Browser support is no longer a reason to hesitate
Chrome, Firefox, Edge and Safari have all supported WebP for years, on desktop and mobile. The places that still refuse it are non-browser contexts: some email clients, older desktop applications, a few upload forms. For anything rendered in a browser, it is safe.
Questions
How much does WebP actually save over PNG?
Typically a quarter to a third of the PNG's size at a quality setting you cannot visually distinguish. The saving is largest on photographic content and smaller on flat colour, where PNG already compresses well.
Will my transparent background survive?
Yes. WebP has a full alpha channel, so transparency is preserved exactly. This is the main reason to convert to WebP rather than to JPG.
Is WebP safe to use on a website now?
Yes. Every current browser has supported it for years. The gaps are outside the browser: some email clients and older desktop software still will not open it.
Should I keep the original PNG?
If you will edit the image again, yes. WebP output here is lossy, and repeated lossy saves compound. Keep a master and convert at publish time.