PNG to WebP Converter — Free, Keeps Transparency, No Upload

Price	100% free, no sign-up
Input	.png (transparency preserved)
Output	WebP (lossy slider, or lossless), batch to 60 files
Processing	Runs locally in your browser — no upload

What is PNG to WebP Converter?

PNG to WebP is the conversion to run when you want a PNG's transparency without a PNG's file size. WebP supports the same alpha channel but compresses far better: a transparent logo or UI asset that costs 300 KB as PNG often lands under 80 KB as WebP at visually identical quality, and for flat graphics the saving is frequently larger still. Every current browser supports WebP — Chrome, Edge, Firefox, and Safari since version 14 — so for anything you publish on the web it is safe to serve. This converter decodes the PNG from your disk, encodes WebP locally at the quality you choose (or losslessly), and keeps the transparent areas intact. Nothing is uploaded, so private artwork and client assets stay on your machine.

Common Uses for PNG to WebP Converter

Shrink transparent logos and icons before adding them to a website
Cut page weight on a site currently serving large PNG screenshots
Prepare UI assets with alpha for a modern web app
Convert a folder of PNG exports into web-optimised assets in one batch
Keep transparency while avoiding JPG's white-background compromise

Why this is the biggest website speed win

Most slow-loading pages are heavy because of images, and most heavy images are PNGs that were never optimised — screenshots from design tools, exported logos, device mockups. Converting that set to WebP is one of the few optimisations with no design cost at all: same appearance, same transparency, a fraction of the bytes. On a page with a dozen such assets the difference is measured in megabytes.

Lossy versus lossless modes

Lossy WebP is what websites should serve: a small quality slider reduction buys a large size reduction. Lossless WebP is the format's lossless mode, which still typically beats PNG on size and is the right choice for assets you will edit again or for graphics where any softening is unacceptable. Use lossy for delivery, lossless for masters.

Serving WebP with a fallback

If you are publishing rather than just converting, the clean approach is to keep the PNG as a fallback and serve the WebP version first using a <picture> element or content negotiation. In practice support is now universal in browsers, so most sites serve WebP alone; a fallback only matters for very old clients or feeds that get copied into other software.

Frequently Asked Questions

Does WebP keep transparency?

Yes — WebP has a full alpha channel, so transparent PNG areas stay transparent. That is the key advantage over converting to JPG, which must fill transparency with a solid colour.

How much smaller will the files be?

For photographs and gradients, typically 40–70% smaller than PNG at matched quality. For flat-colour graphics, screenshots and logos, savings are often 70–90%, because PNG's lossless storage wastes space on images that do not need it.

Which quality should I use?

80–88% is the sweet spot for most assets. For photographic content 75–82% is fine. If you need an exact copy of the pixel data — for example an asset you will re-edit later — use the lossless option instead of the slider.

Do all browsers support WebP?

Yes. Chrome, Edge, Firefox and Opera for years, and Safari since version 14 (2020). Older applications and some content management systems may still reject WebP, so keep PNG or JPG versions if you are distributing files rather than serving them yourself.

Is converting lossy?

Only if you choose the quality slider — that is lossy WebP and it is what most websites serve. A lossless mode is also available when you need exact pixels; it still usually beats PNG on size for photographic content.