Convert PNG to WebP

Shrink PNGs into WebP files for the web — transparency kept, quality under your control, nothing uploaded.

Drag an image here or tap to browse

PNG (and any other image) · free · your image stays on your device

How it works

  1. Drop a PNG. Product shots, screenshots, exported graphics — anything you want to serve on a website works.
  2. Tune the quality. The slider sets the WebP quality (default 90). Watch the resulting KB number to find your sweet spot between crispness and weight.
  3. Download the WebP. The shown size is the real encoded file. Save it and drop it into your site, shop or CMS.

If your site still serves screenshots and graphics as PNG, images are probably your heaviest asset class. Converting them to WebP routinely cuts 60–90% of the weight — better Core Web Vitals, faster pages, lower bandwidth bills — while keeping the one PNG feature JPG never had: transparency.

This converter runs the official libwebp encoder as WebAssembly in your browser. Pick a quality, see the exact output size before saving, and iterate until the number fits your performance budget. No upload also means you can safely convert unreleased product shots or client work.

Need a specific file size instead of a quality level? The compressor searches the quality automatically to hit a KB target.

Frequently asked questions

Why is WebP so much smaller than PNG?

PNG compresses losslessly, which caps how small it can get. WebP uses prediction and transform coding borrowed from video compression, and in its (default) lossy mode it can discard detail the eye barely notices — typically shrinking photos and screenshots by 60–90%.

Does WebP keep my transparent background?

Yes. Unlike JPG, WebP has a full alpha channel, so cut-outs, logos and UI assets stay transparent after conversion — at a fraction of the PNG size.

Is this conversion lossless?

This tool encodes lossy WebP at the quality you choose — that is where the big size wins come from. At 90+ the difference from the PNG is imperceptible for most content. Keep the original PNG as your master copy if you may need pixel-perfect data later.

Which browsers and platforms can show WebP?

Every current browser — Chrome, Safari, Firefox, Edge — has supported WebP for years, so it is safe for any public website. The stragglers are old desktop apps and some upload forms; for those, keep a JPG or PNG fallback.

Do I upload my images here?

No — the libwebp encoder runs as WebAssembly right in the page. Your graphics never leave your machine, which also means unpublished designs stay confidential.

More tools

Convert JPG to WebPConvert WebP to PNGCompress image to a target size

Every tool runs right in your browser — free, no sign-up, no watermarks. Your images never leave your device.