PNG to WebP
Convert PNG images to the compact WebP format — transparency is preserved and you control the quality. Free and private: conversion runs entirely in your browser with no upload.
or click to browse — .png files, multiple at once · stays on your device
How to convert PNG to WebP
- Upload your PNG files. Drag one or more .png images into the box above, or click it to browse. You can convert a whole folder's worth in one go.
- Choose the quality. 90% is a great balance of sharpness and size; slide to 100% for lossless output in most browsers. Files re-encode instantly as you adjust.
- Download your WebP images. Grab files one at a time from the list or press Download all. Transparent areas stay transparent.
About this tool
PNG files are lossless and support transparency, but they are often much larger than they need to be — especially screenshots, UI mockups and graphics destined for the web. WebP keeps the alpha channel PNG is loved for while compressing far more efficiently: converted graphics are frequently 50–80% smaller. Smaller images mean faster page loads, better Core Web Vitals and lower hosting bills, and every modern browser displays WebP natively.
This PNG to WebP converter works completely offline in your browser: your images are encoded by the browser's own WebP encoder and are never uploaded to any server. That keeps private screenshots and unreleased designs safe, and it means there are no queues, accounts, watermarks or file limits.
Frequently asked questions
Is transparency preserved?
Yes. WebP supports a full alpha channel, so transparent and semi-transparent pixels in your PNG survive the conversion exactly. The checkerboard preview above shows any transparent areas.
Is the conversion lossless?
At quality settings below 100% the encoder uses lossy WebP compression, which is visually excellent but not pixel-perfect. At 100%, Chromium-based browsers and Firefox encode true lossless WebP — ideal for logos, icons and pixel art.
Why is my WebP sometimes bigger than the PNG?
Rarely, tiny images or images that were already heavily optimized (for example with an 8-bit palette) can grow. Check the size-change column for each file — if a WebP comes out larger, simply keep the original PNG.
Are my images uploaded anywhere?
No. Everything happens locally in your browser via the HTML5 canvas. Your files never leave your device. Note that browsers whose canvas cannot encode WebP (some Safari versions) will show an error — use Chrome, Edge or Firefox instead.