What is PNG to WebP conversion?
This tool converts PNG images into the WebP format, entirely in your browser with no upload. PNG is a lossless format with transparency support, so quality never degrades when you save. It is ideal for logos, icons, screenshots with text and images with transparent backgrounds, but files tend to be larger. WebP is a modern web format from Google that supports both transparency and higher compression, typically 25–35% smaller than JPG or PNG. It is great for speeding up websites, though a few older programs may not support it.
How to use it
- Select or drop in your PNG image.
- The tool converts it to WebP locally, instantly.
- Click Download to save the WebP file.
When should you convert PNG to WebP?
PNG files are common for graphics and screenshots, but their lossless compression can make photos unnecessarily large.
Convert PNG to WebP when you want faster-loading web pages: WebP is typically 25–35% smaller than PNG while keeping both quality and transparency. It is perfect for website images; if your audience uses older software without WebP support, use JPG or PNG instead.
PNG vs WebP: key differences
| Property | PNG | WebP |
|---|---|---|
| Compression | Lossless | Lossy |
| Transparency | Yes | Yes |
| Best for | Logos, icons, screenshots, transparent graphics | Fast-loading website images |
Speeding up your site? Convert PNG to WebP
When a website's cut-out graphics, icons and illustrations are all PNGs, the files tend to be heavy and slow the page down. Converting them to WebP shrinks the size a lot while keeping the transparent background, usually landing well below the equivalent PNG — great for page speed and mobile data, and every modern browser supports it. The thing to watch is compatibility:
- Very old email clients and some legacy software or systems can't display WebP and will just show a broken image.
- If the picture is going into an email or to someone on an unknown setup, playing it safe with PNG or JPG is wiser.
For images that live on your own site and face modern browsers, WebP is almost always the better call.
This is the only conversion we measured that saves on all four inputs
All four rows go down, and none of them barely: the photo -84%, the screenshot -59%, the illustration -71%, the logo with transparency -74%. This happens because WebP carries two weapons at once: a lossy coder for photographs (a generation newer than JPEG) and a lossless one for flat art and transparency (more efficient than PNG). It does not ask you to classify the content first — rare among the conversions we measured, since PNG to JPG turns around and grows a screenshot by 142%. The logo row is the one worth staring at: 28.8 KB → 7.5 KB with the alpha channel intact, which JPG simply cannot do. The only trade is compatibility: nothing before Safari 14 knows WebP, so public images usually still need a fallback.