Convert PNG to WebP

Convert PNG images to WebP with lossy or lossless modes while keeping transparency intact.

Loading tool…

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

Use lossless for crisp UI graphics and screenshots.
Lossy WebP suits photographic PNGs and saves the most space.

Supported formats

Input: PNG. Output: 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.

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.