Convert PNG to WebP
Free, private and fast: everything runs in your browser and your PNG files are never uploaded.
PNG to WebP: why convert
PNG is the safe format for screenshots, logos, icons and diagrams, but PNG files can be large and slow down a web page. WebP can store the very same pixels in lossless mode, usually in a smaller file; Google, which developed WebP, reports about 26 % smaller files than PNG in its own comparison. Unlike JPG, WebP also keeps the alpha channel, so transparent backgrounds survive in both lossless and lossy mode. Drop your PNG files here, keep the lossless setting or choose a lossy quality for photo-like images, and download the WebP files. The list shows whether each file came out lossless or lossy and how its size changed. Your browser does the encoding, so the images stay on your device; Safari cannot write WebP, and the page says so clearly.
How to convert PNG to WebP
- Drop your .png files in the box, or click to choose them.
- Keep Lossless for screenshots and graphics, or pick a lossy quality for photos and illustrations with gradients.
- Click Convert to WebP and download the WebP file, or a zip with all of them.
What changes when you convert
Lossless really means identical
In lossless mode every pixel, including fully and partly transparent ones, is stored exactly as in the PNG. You can convert back to PNG later and get the same image. The file list labels each result lossless or lossy, based on the data inside the WebP file.
Lossy WebP keeps transparency
JPG cannot store transparency, which is why photos with cut-out backgrounds have traditionally been PNG. Lossy WebP stores the alpha channel separately and keeps it, so a product photo on a transparent background can shrink a lot without getting a white box around it.
Not every PNG gets smaller
Tiny icons and PNGs that were already squeezed by an optimizer may hardly change, and a photo stored as PNG can still be large in lossless WebP. Compare the sizes in the list, and use a lossy setting for photographic content.
16-bit PNGs become 8-bit
WebP stores 8 bits per channel. A 16-bit PNG, as exported by some scanners or scientific tools, is reduced to 8 bits, which is invisible on screen but loses precision for further processing.
Creating WebP needs Chrome, Edge or Firefox
The image is written by the browser. Safari can show WebP but not save it; if a browser cannot produce a real WebP file, you get a message rather than a mislabelled PNG.
About the formats
PNG
PNG (Portable Network Graphics) is a lossless image format from 1996 and the usual format for screenshots, logos, diagrams and images with transparency. Every pixel is stored exactly, so text and sharp edges stay crisp.
- Lossless: saving again never reduces quality.
- Supports full transparency (an alpha channel).
- Photos saved as PNG are usually several times larger than as JPG.
WebP
WebP is an image format Google released in 2010 for faster web pages. It can be lossy like JPG or lossless like PNG, supports transparency and animation, and is usually smaller than both. Websites often serve WebP, which is why saved images end up in this format.
- Supported by all current browsers, but not by every image editor, office program or upload form.
- Lossy and lossless WebP use the same .webp extension.
- Can be animated, like a GIF.
- Images can be at most 16383 × 16383 pixels.
Frequently asked questions
Are my files uploaded?
No. Your browser reads the PNG and writes the WebP locally. Nothing is sent to a server.
Lossless or lossy, which should I choose?
Lossless for screenshots, text, logos, line art and pixel art, where crisp edges matter. Lossy at 80 % or 90 % for photos and illustrations with soft gradients, where it is far smaller and the difference is hard to see.
Will WebP images work on my website?
Yes, every current browser shows WebP, including Safari since version 14. Very old browsers and some email programs do not, so keep the PNG for those uses.
Is the transparency kept?
Yes, in both modes. Transparent and semi-transparent pixels stay transparent in the WebP.