PNG to WebP
Convert PNG to WebP free and shrink your images for the web while keeping transparency. Batch supported, runs in your browser.
The 10-second test: switch off your Wi-Fi (or turn on airplane mode) and use this tool anyway. It keeps working — because there is no server doing the work.
The technical check: open your browser's developer tools, go to the Network tab, and run the tool. Your file is never sent anywhere.
Measured live on this page — files transmitted: 0 · file data sent: 0 bytes
This counter hooks the browser's own networking functions, so it would rise the instant any file data left this page. The only thing this site ever transmits is the contact form, if you choose to send one.
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or drag & drop — pasting works too (Ctrl+V)
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How to convert PNG to WebP
WebP was built for the web: it holds the same picture as a PNG in a fraction of the space, and still supports transparency. If you run a website, converting your PNGs is one of the easiest speed improvements available.
Why convert to WebP
Because it is smaller. WebP is typically 25-35% lighter than PNG for the same visual result, and unlike JPG it keeps transparency. For a website, that is a straight page-speed win with no compromise: logos, icons and screenshots stay sharp and transparent while the files shrink.
Where WebP is not the right choice
Anything that has to be opened by other people in arbitrary software. Older Windows applications, some print workflows and a number of upload forms still reject it. Use WebP for the web, and keep a PNG or JPG for sending to people.
Browser support
Every current browser handles WebP. The compatibility problem is desktop software and older systems, not the web.
Frequently asked questions
Do all browsers support WebP?
Every modern browser does — Chrome, Edge, Firefox, Safari and mobile browsers. Only very old software struggles.
Is transparency kept?
Yes, WebP supports it fully.
How much smaller will files be?
Typically 25-50% smaller than the same PNG, often far more for photographic content.