Convert PNG images to WebP for 26% smaller files with identical quality. Free and browser-based.
Drag & drop files here
or Browse Files
Max file size: 10MB · Max 2 files at once
PNG files are lossless but large. If you publish images on the web, every extra kilobyte slows your page down. WebP gives you the same lossless quality as PNG in a file that is 26% smaller. ConvertFile handles the conversion in your browser, so nothing gets uploaded.
Select or drag and drop your PNG file
Adjust quality settings if desired
Click Convert and download your WebP file
WebP lossless compression produces files that are 26% smaller than PNG, according to Google's own testing. For websites, that means faster page loads, lower bandwidth costs, and better Core Web Vitals scores.
WebP also supports transparency, animation, and lossy compression in a single format. Since all major browsers have supported WebP since 2020, there is no compatibility reason to stick with PNG for web publishing.
| Aspect | PNG | WebP |
|---|---|---|
| Compression | Lossless only | Lossy + Lossless |
| File Size (lossless) | Baseline | 26% smaller |
| Transparency | Yes | Yes |
| Best For | Universal compatibility | Web publishing, performance |
| Browser Support | All browsers | All modern browsers (since 2020) |
| Animation | No | Yes |
PNG (Portable Network Graphics) is a lossless image format created in 1996 as a patent-free alternative to GIF. It supports full-color images with an alpha channel for transparency. PNG files preserve every pixel exactly, which makes them ideal for screenshots, logos, UI elements, and graphics with sharp text. The trade-off is file size: PNG images are typically 3-5x larger than equivalent JPG files for photographic content.
WebP is an image format developed by Google in 2010. It supports both lossy and lossless compression, transparency, and even animation in a single format. Lossless WebP files are 26% smaller than equivalent PNG files. Lossy WebP files are 25-34% smaller than equivalent JPG files. All major browsers have supported WebP since 2020, including Chrome, Firefox, Safari, and Edge.
ConvertFile uses the HTML5 Canvas API to convert images directly in your browser. Your PNG files are never uploaded to a server. The conversion runs on your device's hardware, which is why it finishes in under 2 seconds. Once you close the tab, the converted files are gone from memory.
Lossless WebP files are about 26% smaller than PNG. If you use lossy WebP compression, the savings can be even greater, depending on the quality setting you choose.
Yes. Chrome, Firefox, Safari, Edge, and Opera all support WebP. The last major holdout was Safari, which added support in September 2020 with iOS 14 and macOS Big Sur.
Yes. WebP supports alpha channel transparency in both lossy and lossless modes. Your transparent PNG areas will be preserved in the WebP output.
By default, yes. The quality slider at 100% produces a lossless WebP. Lowering the slider enables lossy compression for even smaller files, with some quality trade-off.
Yes. The conversion uses the Canvas API in your browser. Nothing is uploaded to any server. You can disconnect from the internet and the converter still works.
For web publishing, yes. WebP gives you smaller files with no quality loss. For archival storage or print workflows, PNG remains the safer choice because of its universal support in image editors.
Yes. ConvertFile also has a WebP to PNG converter. The round-trip conversion is lossless if both conversions use lossless settings.
No. The output WebP has the exact same width and height as the input PNG. Only the file format and compression method change.