Why convert PNG to WEBP?
WEBP is Google’s image format designed specifically for the web. For most images it produces files 25–80% smaller than PNG while looking the same to the human eye. Smaller images mean faster pages, lower bandwidth bills, and better Core Web Vitals scores — which Google uses as a ranking signal.
PNG vs WEBP: when each wins
| PNG | WEBP | |
|---|---|---|
| File size | Baseline | 25–80% smaller |
| Transparency | Full alpha | Full alpha |
| Lossless mode | Always | Yes, optional |
| Lossy mode | No | Yes |
| Browser support | 100% | ~97% (2025) |
| Editing software | Universal | Photoshop 23+, GIMP 2.10+ |
| Best for | Master files, editing | Web delivery |
How to convert PNG to WEBP
- Drop your PNG files — drag onto the upload zone, click to browse, or paste from clipboard. Up to 30 at once.
- Pick lossy or lossless — lossy at 85% is the web default; lossless if you need pixel-perfect output (UI assets, logos).
- Click Convert — encoding happens locally with the Canvas API. Your files stay on your device.
- Download — one by one, or all at once as a ZIP.
Quality settings: what to pick
- 95–100%: archival, master assets, or when downstream editing is expected.
- 80–90%: the web sweet spot — visually indistinguishable from the source for almost all images.
- 60–75%: aggressive compression for thumbnails or where bandwidth matters more than fidelity.
- Below 60%: visible artifacts on photos. Acceptable only for previews/placeholders.
Serving WEBP with a PNG fallback
~3% of users are still on browsers without WEBP support. Use the <picture> element to serve both:
<picture>
<source srcset="hero.webp" type="image/webp" />
<img src="hero.png" alt="..." />
</picture>Privacy
Every byte stays in your browser. No upload, no temporary server file, no log. The conversion runs in a <canvas> element using the browser’s built-in WEBP encoder.