How to convert PNG to WebP (3 steps)
- 1. Drop your PNG file into the converter above — drag-and-drop or click to select. You can also paste from clipboard on desktop.
- 2. Pixnova converts it to WebP instantly using the HTML5 canvas API running in your browser. No upload happens — your image stays on your device.
- 3. Download the WebP file in one click. The output keeps the original resolution and has no watermark.
What is PNG?
PNG (Portable Network Graphics) is a lossless format with full alpha transparency, perfect for logos and graphics — but file sizes are large because every pixel is stored exactly.
What is WebP?
WebP is Google's modern image format (2010) that supports both lossless and lossy compression plus alpha and animation. It produces dramatically smaller files than PNG with the same quality.
PNG vs WebP: feature comparison
| Feature | PNG | WebP |
|---|---|---|
| Compression | Lossless only | Lossless or lossy |
| Transparency | Full alpha | Full alpha |
| Typical file size | 100% | 20–40% |
| Animation | Via APNG only | Native animated WebP |
| Browser support | Universal | 97%+ globally |
| SEO benefit | Neutral | Faster LCP — boosts Core Web Vitals |
When to convert PNG to WebP
Faster website loading
Replacing PNGs with WebP shrinks pages and improves Largest Contentful Paint — a direct Google ranking signal.
Mobile-friendly graphics
Mobile users on slow networks load WebP 3-5× faster than the equivalent PNG.
App icons & UI assets
Modern apps ship WebP icons to keep install size down without giving up transparency or quality.
E-commerce product images
Stores with hundreds of PNGs cut hosting costs and bounce rates by switching to WebP.
Email newsletters
Smaller embedded images mean faster Gmail loads and better deliverability scores.
CDN bandwidth savings
WebP cuts CDN egress by 50-70% — a real cost saving at scale.
Pro tips for the best result
- Use WebP for every new image on your website unless you specifically need PNG (e.g. very old browser support).
- Pair WebP with the HTML <picture> element so legacy browsers fall back to PNG automatically.
- Keep your PNG masters — re-encode from PNG when WebP quality settings change, not from a previous WebP.
- For graphics with hard edges (logos, text), lossy WebP is usually still visually perfect.
- After converting, double-check the file in your design tool — colors, alpha, and gradients should all match the original.
Why use Pixnova for PNG to WebP?
- Dramatic file-size savings — up to 80% smaller than PNG with the same visible quality.
- Transparency preserved exactly — WebP and PNG share the same 8-bit alpha channel.
- 100% browser-based — your image never leaves your device.
- No watermark, no signup, no usage limits.
- SEO-friendly: WebP is what Google specifically recommends for faster pages and better Core Web Vitals.
Frequently asked questions
How do I convert PNG to WebP?
Drop your PNG into the converter above. Pixnova encodes it to WebP using the browser's native encoder — instant, private, watermark-free.
How much smaller is WebP than PNG?
Typically 25-50% smaller for lossless WebP, and 60-80% smaller for lossy WebP — with no visible quality drop in most cases. The savings are largest for photographs.
Does WebP support transparency?
Yes. WebP supports the same 8-bit alpha channel as PNG, so transparent backgrounds are preserved exactly.
Do all browsers support WebP?
Yes. WebP has 97%+ global browser support — every modern Chrome, Edge, Firefox, Safari, and mobile browser. Only IE11 and very old Safari versions can't display it.
Is WebP good for SEO?
Yes. Google's PageSpeed Insights specifically recommends WebP for faster loading, and Core Web Vitals scores improve when large PNGs are replaced with WebP.
Lossless vs lossy WebP — which one does Pixnova use?
Pixnova uses lossy WebP by default for the biggest file savings while keeping visual quality high. The encoder runs in your browser using the standard canvas.toBlob API.
Are my images uploaded?
No. Encoding happens 100% in your browser — there is no server upload.
Other free Pixnova tools
Need a different conversion? Try JPG → PNG, PNG → JPG, PNG → WebP, WebP → PNG, JPG → WebP, or WebP → JPG.
Beyond conversions, Pixnova also has a free AI background remover, a watermark remover, and an image compressor — all running 100% in your browser.