PNG to WebP Converter

Converting a PNG to WebP typically produces a much smaller file while keeping full transparency support, something JPG can't do. People convert PNG to WebP to speed up website loading times, to meet a platform's preferred image format, or to shrink graphics and screenshots for delivery without giving up the alpha channel. This tool converts PNG to WebP directly in your browser, no software to install and no file uploaded to a server.

How to use

1. Upload your PNG. Drag a PNG file onto the drop zone or click to browse. Only PNG files are accepted for this converter.
2. Click Convert to WebP. Adjust the quality slider first if you want, it defaults to 90%. Unlike converting to JPG, any transparency in your PNG is carried over, WebP supports an alpha channel just like PNG does.
3. Download your WebP. Click Save to download the converted file, or Save As to pick the filename and location yourself.

PNG vs WebP

PNG uses lossless compression, so every pixel is preserved exactly, which is why it's the traditional default for screenshots, logos, and graphics with transparency. WebP is a newer format that supports both a transparency channel like PNG and considerably better compression, this tool encodes WebP using an adjustable quality setting, which is a lossy re-encode: it doesn't preserve every pixel exactly the way PNG does, but at reasonably high quality settings the visual difference from the source is usually minimal, while the file size drop can be substantial. WebP now has broad support across modern browsers, so it's a practical choice for most web delivery use cases where PNG was previously the default.

Tips for best results

• Transparency is preserved, not flattened. Unlike converting PNG to JPG, converting PNG to WebP keeps your alpha channel intact. If your PNG has a transparent background, the WebP will too.
• This is a lossy re-encode. Even though the source PNG was lossless, this converter's WebP output uses a quality setting, meaning it won't be pixel-for-pixel identical to the source. At the default 90% quality the difference is usually invisible, but it isn't a bit-for-bit copy.
• Raise the quality slider for graphics with text or hard edges. Screenshots and UI graphics with sharp edges show compression artifacts more readily than photos. If you notice softening around text or lines, try 95% quality.
• Check WebP support for your destination. WebP is supported by all major modern browsers and most current image tools, but some older software and specific upload forms still don't accept it. Confirm your destination supports WebP before relying on it exclusively.

Why use PixMidas

• 100% private. The conversion redraws your image on a canvas and re-encodes it entirely in your browser. Your PNG is never uploaded to any server.
• Keeps your transparency. Unlike a PNG-to-JPG conversion, converting to WebP doesn't force transparent pixels to a solid background color.
• No account needed. Free and instant. Works in any modern browser, no installation required.

Frequently asked questions

Will my transparent background survive the conversion?

Yes. WebP supports an alpha channel the same way PNG does, so any transparency in your source PNG is carried through to the WebP output. This is different from converting to JPG, which has no transparency support at all and would fill transparent areas with white.

Is WebP actually lossless like my original PNG?

Not with this tool. This converter encodes WebP using an adjustable quality setting, which is a lossy re-encode, not a pixel-perfect copy of your PNG. At the default 90% quality, the visual difference is usually imperceptible for most images, but it is technically not identical to the source the way a PNG-to-PNG copy would be.

How much smaller will the WebP file be?

It varies by image content, but WebP typically produces meaningfully smaller files than PNG at comparable visual quality, often 25–50% smaller for photographic or complex images. Simple graphics with few colors may see a smaller size reduction since PNG already compresses that kind of content efficiently.

Will everything be able to open the WebP file?

Nearly everything modern will. All major browsers (Chrome, Firefox, Safari, Edge) have supported WebP for years, and most current image editors and operating systems can open it. Some older software and a small number of upload forms still don't accept WebP, if you're unsure, check the destination's requirements before relying on WebP exclusively.

What quality setting should I choose?

The default 90% is a good general-purpose setting that keeps most images close to visually identical to the source PNG. Raise it toward 95% for graphics with fine text or sharp edges where you want to minimize any visible softening. Lower it toward 50–70% if file size matters more than maximum fidelity.

Is my image uploaded to a server?

No. The entire conversion runs on your device using your browser's Canvas API. Your PNG is read locally, redrawn, and re-encoded as WebP without ever being sent anywhere.