Convert PNG to WebP
Turn PNGs into WebP files that keep their transparency and are much smaller. Choose lossy or lossless. Convert hundreds at a time, all in your browser.
- Free, no sign-up
- Runs in your browser. Your files never leave your device.
- Updated
or paste an image with Ctrl V
How do I convert PNG to WebP?
- Drop PNG files or a folder on the box above (or paste a screenshot).
- The tool converts each one to WebP at once. Leave Balanced on, or tick Lossless for an exact copy.
- Check any image with Compare, then download all of them as a .zip.
How much smaller is WebP than PNG?
Google’s own figures put lossless WebP at 26% smaller than PNG, and lossy WebP with transparency at typically 3× smaller (developers.google.com/speed/webp). On our two sample PNGs, measured on 4 November 2026:
| Image | PNG | WebP, Balanced | WebP, Lossless |
|---|---|---|---|
| App screenshot, 2194 × 1634 | 647 KB | 142 KB (−78%) | 162 KB (−75%) |
| Logo with soft shadow, 1024 × 1024 | 1.63 MB | 169 KB (−90%) | 695 KB (−58%) |
When should I keep PNG instead?
Keep PNG when the file goes somewhere that does not take WebP: some email clients, older desktop software, print services, and documents you will edit in tools that cannot open it. For those, the PNG compressor makes the PNG itself smaller.
What about PNGs that are photos?
Those gain the most. A photo saved as PNG is stored pixel for pixel. As lossy WebP it is often a tenth of the size and looks the same. Set Quality to taste and check faces and fine edges in Compare.
Questions
Does WebP keep the transparency of my PNG?
Yes. Both lossy and lossless WebP keep the alpha channel (the transparency), soft edges and shadows included. Nothing is filled in, unlike converting to JPG.
Should I pick lossy or lossless WebP?
Lossy (the default) gives the smallest files and suits photos, illustrations and most screenshots on a website. Tick Lossless for an exact copy of every pixel. It is still usually smaller than the PNG, and much smaller for flat graphics.
Will every browser show WebP?
Every current browser does: Chrome, Edge, Firefox and Safari. Safari on iPhone has shown WebP since iOS 14, and on Mac since Safari 16, according to caniuse.com (checked 4 November 2026). Some desktop apps, email clients and document editors still prefer PNG or JPG.
Can I convert a whole folder of PNGs?
Yes. Drop the folder on the box. The tool converts every image inside. The .zip keeps the folder structure, and each file is renamed from .png to .webp.
Is anything uploaded?
No. The WebP encoder runs in your browser, so your PNGs stay on your device.
More free tools
- Image Compressor Shrink JPG, PNG, WebP and AVIF images, one or hundreds at a time.
- Compress JPG Make JPG photos smaller, or get them under a size like 200 KB.
- Compress PNG Shrink screenshots and logos. Uses a 256-color palette and keeps transparency.
- Image Resizer Resize a whole folder to a width, height or percentage.
- JPG to WebP Save photos as WebP, usually a quarter to a third smaller.
Save what you find in one click.
Kortex is a Chrome extension for Gemini Notebook (formerly NotebookLM). It sends AI chats, web pages, posts and YouTube videos into the notebook you pick. It keeps your notebooks organized. It exports them back out.
No card needed.