Convert WebP images to lossless PNG while preserving transparency, with optional batch and ZIP download.
Convert PNG to WebP
Convert PNG images to WebP with lossy or lossless modes while keeping transparency intact.
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How to use PNG to WebP
- Upload your PNG files.
- Choose lossy or lossless and set quality.
- Convert and check transparency in the preview.
- Batch several files and download them together as a ZIP.
About this tool
Convert PNG images to WebP with lossy or lossless modes while keeping transparency. Lossless WebP is often smaller than the original PNG with identical pixels.
Recommended settings
Settings we suggest
- Use lossless for crisp UI graphics and screenshots.
- Lossy WebP suits photographic PNGs and saves the most space.
Supported formats
Input: PNG. Output: WEBP.
Input formats
PNG
Output formats
WebP
Quality & file size
Lossy formats (JPEG, WebP, AVIF) trade detail for smaller files as you lower the quality; PNG stays lossless regardless of the slider. The tool always shows the original and result sizes so you can judge the trade-off, and it never recommends a result that is larger than your original as an “optimisation”.
Privacy
Every image is decoded, transformed and re-encoded entirely in your browser using the Canvas API and a Web Worker. Files are never uploaded, are not stored in localStorage, and are cleared from memory when you remove them or close the page.
More detail: how we process images, security and our privacy policy.
Common issues & limitations
- Animated PNG is not supported; a single frame is used.
- All processing happens on your device; nothing is uploaded, so very large batches are limited by your available memory.
Frequently asked questions
Does WebP keep PNG transparency?
Yes. Both lossy and lossless WebP support an alpha channel, so transparent PNGs stay transparent.
Should I use lossy or lossless?
Lossless is best for crisp graphics and screenshots. Lossy gives smaller files and suits photographic PNGs.
Are my images uploaded to a server?
No. Every image is decoded, processed and encoded entirely inside your browser using the Canvas API. The files never leave your device and are discarded when you close the page.