Compress PNG into smaller WebP, transparency kept
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Max file size: 20MB
Heavy PNGs are a common cause of slow pages, especially screenshots and illustrations exported straight from design tools. WebP supports transparency just like PNG but stores images far more compactly, so converting is an easy win for page speed. pdfty's PNG to WebP converter is built for preparing site images, blog screenshots and transparent product shots.
We encode on our server with Pillow at quality 85, which is lossy: photos and screenshots look the same, while very fine pixel art or tiny text may show slight softening. Transparent areas stay transparent. All modern browsers display WebP, but some desktop programs still do not, so keep your PNG master files.
Upload many PNGs at once and get a ZIP with one WebP per image. Free: no daily limit, up to 20 MB per file, no watermark, no sign-up. Files are deleted within 1 hour. Combine it with Resize Image when screenshots are wider than your content column — fewer pixels save even more.
Drag and drop one or several .png images. Up to 20 MB each free.
Each image is encoded as WebP at quality 85, keeping transparency.
One file gives one .webp; several files arrive as a ZIP.
Upload the WebPs to your site or CMS in place of the PNGs.
Uploads and results are deleted from our servers within 1 hour.