Add up to 30 PNG images (up to 50 MB each) and convert them to WebP, either lossy with a quality slider (10 to 100, default 85) or lossless, which keeps every pixel. Transparency carries over in both modes, and you can pick AVIF as the output instead. The conversion happens in your browser, and you download the files one by one or as a ZIP.
Free online PNG to WebP converter
WebP files are usually much smaller than PNG files of the same image, which makes pages load faster. This PNG to WebP converter turns your PNGs into WebP without uploading them.
How to convert PNG to WebP
- Add your PNG files by dragging them in or clicking to browse.
- Keep WebP as the output, or choose AVIF.
- Set the quality, or turn on lossless to keep the image identical.
- Download the WebP files, or all of them as a ZIP.
Why convert PNG to WebP?
Lossy WebP is often a fraction of the size of a PNG, especially for photos and screenshots with many colors. Lossless WebP is usually smaller than the same image as PNG too. Smaller images mean faster pages, lower bandwidth costs and a better Largest Contentful Paint score, which is part of Google's Core Web Vitals.
WebP supports transparency in both lossy and lossless mode, so logos and cut-outs keep their transparent background. Every current version of Chrome, Firefox, Safari and Edge displays it.
What the converter does
Lossless mode keeps every pixel exactly as in the PNG, which suits logos, icons, interface graphics and anything with sharp edges or text. Lossy mode lets you trade a little detail for a much smaller file, which suits photos. The quality slider applies to lossy WebP and to AVIF. When there are several results, you can download them individually or as one ZIP. Metadata such as text chunks is not copied to the WebP.
Alt text for WebP images
Converting the format doesn't change how you describe the image. Write alt text about what the image shows, such as "red running shoe, side view", include details that matter (color, model, use), and write for people, not keywords.
PNG vs WebP comparison
| Feature | PNG | WebP |
|---|---|---|
| File size | Larger | Usually smaller |
| Compression | Lossless | Lossy or lossless |
| Transparency | Yes | Yes |
| Animation | APNG only | Yes |
| Browser support | Universal | All current browsers |
| Best for | Graphics, logos, editing | Web images, photos and graphics |
Who uses it
Web developers convert PNG graphics and screenshots for faster sites. Bloggers convert images for posts, store owners convert product images and logos, and SEO specialists use WebP to improve page speed scores.
Technical specifications
Input is PNG and output is WebP (or AVIF). Each batch takes up to 30 files of up to 50 MB and 64 megapixels each. Quality goes from 10 to 100, with a lossless option for WebP. Processing happens in your browser, and files are never uploaded or stored on a server.
Browser support
WebP works in Chrome since version 23, Edge since 18, Firefox since 65 and Safari since version 14 (macOS Big Sur and iOS 14). Internet Explorer never supported it. If you still serve very old browsers, keep a PNG or JPG fallback with the <picture> element shown below.
Frequently Asked Questions
Why convert PNG to WebP?
WebP files are usually smaller than PNG for the same image, both lossy and lossless. WebP also supports transparency, and all current browsers display it.
Is WebP widely supported by browsers?
Yes. Current versions of Chrome, Firefox, Safari and Edge all support WebP. Only very old browsers, such as Internet Explorer, need a JPG or PNG fallback.
Will the image quality be affected when converting PNG to WebP?
With lossless WebP, no: every pixel stays the same. With lossy WebP, a little detail is lost in exchange for a much smaller file; at the default quality of 85 the difference is hard to see in most images.
Can I convert multiple PNG files to WebP at once?
Yes. Add up to 30 PNG files and convert them all with the same settings, then download them together as a ZIP.
Is this PNG to WebP converter really free?
Yes. There are no fees, watermarks or sign-up.
What's the maximum file size I can convert?
Each PNG can be up to 50 MB and 64 megapixels.
Should I use lossless or lossy compression?
Use lossless for graphics, logos, screenshots and images that must stay pixel-perfect. Use lossy for photos and images where a smaller file matters more than an exact copy.
How do I implement WebP with fallbacks?
Use the HTML <picture> element, which lets the browser pick the first format it supports:
<picture>
<source srcset="image.webp" type="image/webp">
<img src="image.png" alt="Description">
</picture>Related Tools
- PNG to JPG Converter to convert PNG to JPG
- PNG to AVIF Converter to convert PNG to AVIF
- WebP to PNG/JPG/AVIF Converter to convert WebP to other formats
- WebP to JPG Converter to convert WebP to JPG
- Image Optimizer to resize and compress for the web in one step
- WebP Compressor to compress WebP files further