Convert PNG to WebP
Convert PNG images to WebP format online for free. Reduce file size and improve website performance.
How to Convert PNG to WebP
Upload your PNG image, click Convert to WebP and download the optimized file instantly. WebP images provide smaller file sizes while maintaining excellent visual quality.
WebP can preserve transparency while producing a smaller web asset than many PNG files. It is often useful for cutouts, interface graphics, and mixed photographic designs, provided the destination accepts WebP.
The current Pixores conversion uses a high-quality WebP output. Always inspect transparent edges and small text because delivery requirements differ between logos, screenshots, and photographs.
Behavior and limits reviewed against the current Pixores implementation on August 14, 2026.- Input
- PNG
- Output
- WebP
- Encoder quality
- 90
- Transparency
- Supported by WebP
How to use this tool
- Confirm whether the PNG contains transparency.
- Convert the original-resolution PNG.
- Place the WebP over light and dark backgrounds.
- Compare text, edges, gradients, and file size.
- Keep the PNG as a master or fallback when compatibility matters.
When it is a good fit
- Transparent web graphics
- Product cutouts
- Mixed photo-and-text assets
- Reducing oversized PNG delivery files
Limitations to check
- Do not use file size as the only quality test.
- Older tools may still require PNG.
- Very simple PNG graphics can already be efficient.
File handling and privacy
Pixores sends the PNG to its conversion endpoint and returns the encoded WebP. The guide recommends retaining the original PNG separately.
Frequently asked questions
Will transparency be preserved?
WebP supports alpha transparency, so a valid transparent PNG can retain transparent areas in the converted output.
Should I replace every PNG with WebP?
No. Keep PNG where exact lossless pixels, editing compatibility, or a required fallback matters.
Why test on two backgrounds?
Light and dark backgrounds reveal edge contamination, halos, and partially transparent pixels that may be invisible on one color.