Convert PNG to WebP Online — Smaller Files, Same Quality
PNG has been the web's lossless workhorse for two decades, but it was never designed with today's performance budgets in mind. Google's WebP format does everything PNG does — pixel-exact lossless mode, full alpha transparency — while producing files that are routinely 20–30% smaller, and its lossy mode beats both PNG and JPG by even wider margins.
The wins compound quickly at scale. A product page with fifteen 500 KB PNGs becomes a page with fifteen 150 KB WebPs: faster Largest Contentful Paint, lower bandwidth bills, happier mobile visitors and better Core Web Vitals scores, which feed directly into search rankings. Because WebP keeps transparency intact, your logos, icons, illustrations and UI screenshots all survive the conversion without the white-box artifacts a JPG conversion would introduce.
This converter gives you a quality slider with a live size estimate so you can find each image's sweet spot before downloading — no batch guessing, no surprises after upload. Conversion happens locally through your browser's canvas engine; files are never transmitted anywhere, making it safe for unreleased designs and client work alike. Screenshots that must stay in PNG format can still be slimmed with the Image Compressor.
How to Use This Tool
- Add your PNG — drag, browse or paste the image.
- Select WebP output — locked in automatically since your source is PNG.
- Tune quality — 75–90 suits most web images; watch the estimated size respond instantly.
- Download the .webp — ready to drop into your site or app.
Benefits
- 20–80% smaller — depending on content and quality setting.
- Transparency preserved — alpha channel survives conversion.
- Live size estimate — know the result before you commit.
- Private by design — browser-local processing only.
- Free forever — unlimited conversions, zero signup.
Need the opposite direction? Convert WebP back to PNG with transparency fully preserved.