RunToolRunPNG to WebP
Convert PNG files to WebP format.
How to Convert PNG to WebP
Select your PNG files
Click the upload area or drop one or more .png images — batch conversion is supported.
In-browser WebP encoding
Each PNG is re-encoded as WebP on your device, keeping alpha transparency intact.
Download the WebP files
Save the optimized images — significantly smaller and ready for the web.
The conversion that actually saves the most
Of all the format changes people make for web performance, PNG to WebP is usually the biggest single win. WebP's lossless mode alone is typically 20–30 percent smaller than PNG for the same exact pixels, and its lossy mode can reduce a photographic PNG by ninety percent or more.
It also keeps what made PNG worth using: the alpha channel. A logo with a soft transparent edge converts to WebP with that edge intact, which is why WebP replaced PNG as the sensible default for web graphics rather than merely competing with it.
Lossless or lossy, and how to choose
If the PNG contains flat graphics, text, screenshots or line art, lossless WebP is the right mode — it keeps every pixel exact and still saves a useful amount. If the PNG contains a photograph, lossy WebP will save vastly more and the difference will not be visible at a sensible quality setting.
The mistake is applying lossy compression to interface screenshots. Hard edges around text are what lossy codecs handle worst, and a screenshot compressed lossily develops the same fuzzy halos that make JPEG unsuitable for the same content. Match the mode to the content, not to the file size you wish you had.
Browser support is no longer the question
Every current browser decodes WebP, and has for years. The remaining gaps are outside the browser: some desktop image viewers, some older design tools, some upload forms, and email clients, which lag behind browsers by a considerable margin.
The practical rule follows from that. Use WebP for anything displayed on a web page you control. Keep or export PNG for anything that will be attached to an email, opened in unknown software, or handed to a person who will do something unpredictable with it.
Keep the PNG
The PNG is your master copy, especially if you used lossy WebP. If you later need a different size, another format, or a version for print, generating it from the lossless original is always better than generating it from a compressed derivative.
Conversion runs in your browser, so unreleased designs, internal screenshots and client assets are not uploaded anywhere. Batches are limited by device memory rather than by a server, which in practice means converting in groups rather than several hundred files at once.
Serving both formats rather than choosing
On a web page you do not have to pick one. The picture element lets a browser choose a WebP source and fall back to the PNG automatically, so modern visitors get the smaller file and anything that cannot read WebP still sees the image. This is the standard arrangement on sites that care about load time.
That approach also removes the anxiety from the conversion. Keep the PNG in the repository as the fallback and the master, generate the WebP from it, and let the browser decide. Nothing is lost, and the page gets faster for almost everyone who visits it.