PNG to WebP Converter

Google's Lighthouse performance audit has a specific check called 'Serve images in next-gen formats.' If your page serves PNG files where WebP could be used instead, Lighthouse flags it and subtracts points from your Performance score. That score feeds into Core Web Vitals, which Google uses as a ranking factor. The practical implication: serving WebP instead of PNG can measurably improve your page's position in search results, not just its load time.

The compression difference is significant for design assets. A transparent logo saved as PNG might be 180KB. The same logo as WebP at 92% quality is typically 40 to 70KB — a 60 to 75 percent reduction. Multiply that across all the images on a page and you get a measurable improvement in LCP (Largest Contentful Paint), which is the metric Google uses to measure how quickly a page's main content becomes visible. Faster LCP means better Core Web Vitals scores, which means better ranking potential.

Transparency is fully preserved in the conversion. WebP supports alpha channel transparency, so logos, icons, cutout product photos, and UI elements with transparent backgrounds convert cleanly. The transparent areas in your PNG will remain transparent in the WebP output. This is the key advantage WebP has over JPG for these types of assets: you get the file size reduction of a lossy format without sacrificing the transparency support you'd lose with JPEG.

Browser support for WebP is now universal across Chrome, Firefox, Safari (since version 14), and Edge. The old concern about needing JPG or PNG fallbacks for Safari is resolved. The only remaining reason to keep PNG as the primary format is non-browser use: email clients, certain design tools, print services, and applications that haven't implemented WebP decoding. For everything served in a browser, WebP is the better choice.