PNG to WebP converter
TL;DR: drop PNG files, set the quality and get WebP copies that are usually several times smaller, with transparency kept. See the saving for every file and download all of them as a ZIP.
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PNG files are heavy because they store every pixel without loss. On a web page that means slower loading, especially on mobile. WebP keeps transparency like PNG but compresses much better, so converting PNG to WebP is one of the quickest ways to make a page lighter.
How to use the converter
- Add images. Drag up to 50 files onto the box, choose them with the button or paste a copied image with Ctrl+V.
- Check the output format. It is already set for this page; you can switch between PNG, JPG and WebP at any time.
- Adjust the settings. For JPG and WebP set the quality (85 is a good default). For JPG pick the colour that fills transparent areas.
- Download. Save files one by one or all together as a ZIP. Each row shows the size before and after.
How much smaller WebP gets
| Format | Compression | Transparency | Best for |
|---|---|---|---|
| WebP | Lossy or lossless | Yes | Photos and graphics on websites |
| PNG | Lossless | Yes | Screenshots, logos, images you will edit again |
| JPG | Lossy | No | Photos for email, documents, older software |
| SVG | Vector (text) | Yes | Icons and logos at any size |
According to Google, lossless WebP is about 26% smaller than PNG, and lossy WebP saves far more. For screenshots, illustrations and product photos on a transparent background, a WebP at quality 80–90 is often 3–10 times smaller than the PNG with no visible difference. For pixel-perfect graphics such as small icons, use quality 100.
At YuSMP Group we build websites and keep them fast, and images and PDFs are the most common reason pages load slowly. If you need to move a whole site to lighter formats rather than a few files, see our web development service or start with the page speed test.
FAQ
How do I convert PNG to WebP?
Drop PNG files onto the box above or choose them with the button. WebP is already selected. Move the quality slider if needed and download the files one by one or as a ZIP.
Does WebP keep PNG transparency?
Yes. WebP supports an alpha channel, so transparent and semi-transparent pixels stay as they were in the PNG.
What quality should I choose?
Quality 80–90 is a good default for photos and illustrations: the file is much smaller and the difference is hard to see. Use 100 for small icons and pixel art where every pixel matters.
Do all browsers show WebP?
Yes. Chrome, Edge, Firefox and Safari (since version 14) display WebP. If you need to support very old browsers, serve a PNG fallback with the <picture> element.
Does it work in Safari?
Yes. Safari can show WebP but cannot create it on its own, so in Safari the page loads a small built-in WebP encoder (libwebp) once and converts the files with it, still without uploading anything.
Are my files uploaded?
No. Everything happens in your browser. The files never leave your device and are not stored anywhere.
Can I convert many PNG files at once?
Yes, up to 50 files per batch, each up to 100 MB. The total saving is shown above the list.