About PNG to WebP

What is this tool?

PNG to WebP is a free, browser-based converter that transforms PNG and JPG images into WebP format — a modern image format developed by Google that delivers significantly smaller file sizes without sacrificing visual quality.

All conversion happens entirely in your browser using the Canvas API. Your images are never uploaded to any server — they never leave your device.

Who built it?

I built this tool because I needed a fast, private way to batch-convert images for my own web projects — without uploading files to a third-party service. If you find it useful, I'd love to hear from you on X.

Why WebP?

WebP images are 26% smaller than PNG and 25–34% smaller than JPG at equivalent visual quality (Google WebP study). Smaller images mean faster page loads, better Core Web Vitals scores, and lower bandwidth costs — with no perceptible quality loss for most images.

Technology

Built with Astro, React, and Tailwind CSS. Image conversion uses the browser's native HTMLCanvasElement.toBlob() API — no external libraries, no server round-trips.