WebP can lower image transfer size while retaining transparency where the PNG uses it.
PNG to WebP converter
Convert PNG images to WebP locally with adjustable quality.
No upload Batch ready Mobile friendly
Drop files here or pick from your device. Supported: PNG.
Up to 30 files, 100 MB each. 0 files selected
No files selected Images stay in this browser tab while ImgMini works.
Drag the crop box. Use the handle to resize.
- 1SelectChoose or drop your images.
- 2ProcessAdjust the options and run the tool.
- 3DownloadSave the finished files.
Your images stay private.Processing happens locally in this browser. Files are never uploaded or stored.
Continue with ImgMini
Related workflows use the same private browser pipeline.
Use WebP to reduce the delivery weight of PNG assets
PNG to WebP is most useful for website screenshots, product graphics, and transparent assets where a smaller download matters. WebP supports transparency and adjustable lossy quality, so it can reduce file size substantially without forcing a background color.
The best setting depends on the content. Photographs and soft gradients tolerate lower quality better than small text, interface screenshots, or sharp flat-color artwork. The comparison viewer is more reliable than choosing a quality number in isolation.
Adjust after checking edges, text, gradients, and the measured output size.
Transparent PNG pixels can remain transparent in browser-generated WebP output.
Optimize against visible detail and measured bytes
Choose WebP when the receiving browser or platform supports it and delivery size matters. Retain PNG for archival masters, pixel-sensitive screenshots, or compatibility with tools that do not accept WebP.
Checks before downloading
- Inspect text and high-contrast edges at 100% before accepting a low quality setting.
- Compare actual byte reduction; very small or already optimized PNG files may gain little.
- Store the PNG original so future variants do not start from a lossy WebP copy.
Questions
Are my images uploaded to ImgMini?
No. ImgMini runs the conversion in your browser. The selected files stay on your device unless you choose to share them elsewhere.
Does WebP support transparency?
Yes. Browser WebP export can keep transparency for PNG files with alpha.