PNG to WebP Converter
Convert PNG images to WebP while preserving transparency. WebP is up to 26% smaller than PNG for lossless compression.
Transparency preserved
WebP fully supports alpha transparency, making it a perfect lossless replacement for PNG images with transparent backgrounds.
Smaller than PNG
WebP lossless compression produces files 26% smaller than PNG on average, without any quality loss.
Ideal for web graphics
Replace heavy PNG assets (icons, logos, illustrations) with lighter WebP files to speed up your website.
Real-world size comparison
Average sizes measured on typical PNG assets (logos, icons, illustrations, screenshots) converted to lossy WebP at quality 85. Your numbers will vary with the visual complexity of the source.
| Image type | Source | Output | Saved |
|---|---|---|---|
| Transparent brand logo 512×512 | 78 KB | 22 KB | −72% |
| UI icon 128×128 | 16 KB | 5 KB | −69% |
| Vector illustration export 800×600 | 210 KB | 58 KB | −72% |
| App screenshot 1440×900 | 320 KB | 85 KB | −73% |
Compatibility at a glance
WebP is universally supported on the modern web and preserves transparency everywhere, except for a few historical holdouts.
| Platform | Status |
|---|---|
| Chrome, Firefox, Edge, Opera (since 2014) | Supported |
| Safari 14+ (macOS Big Sur, iOS 14, sept. 2020) | Supported |
| WordPress (5.8+), Shopify, Squarespace | Supported |
| Outlook desktop on Windows | Not supported |
| Internet Explorer 11 and pre-2020 Safari | Partial / fallback advised |
When to convert, when to keep the original
Convert when
- Icons, logos, and UI elements served on a website
- Illustrations and infographics embedded in an article
- Screenshots with transparency on a technical blog
- Vector hero images where LCP and Core Web Vitals matter
Keep the original when
- The image will be attached to an Outlook desktop email
- The PNG is the source of a Photoshop or Figma edit
- You are sending it to a print shop that doesn't read WebP
- The PNG is already under 5 KB (the gain is marginal)
Frequently Asked Questions
Does WebP support PNG transparency?
Yes, WebP supports full alpha channel transparency, just like PNG. Your transparent backgrounds and semi-transparent elements will be preserved perfectly.
When should I use WebP instead of PNG?
Use WebP for any image served on the web: icons, logos, UI elements, illustrations. Keep PNG only for source files or when software compatibility requires it.
What quality setting should I use for PNG to WebP?
For lossless-quality results, use quality 90–100. For a balance between size and quality (lossy), quality 75–85 is generally a good starting point.
Lossless or lossy WebP for a PNG, which one should I choose?
For icons, logos, and flat-color illustrations, lossless WebP delivers files 25 to 35% smaller than PNG without touching a pixel. For photos exported as PNG or complex screenshots, lossy WebP at quality 85–95 stays visually identical while cutting weight by three or more.
How much size reduction should I expect compared to PNG?
26% on average in lossless mode, up to 80% in lossy at quality 85. The gain depends on the content: visuals with flat areas (logos, UI) compress better than detailed illustrations or photos exported as PNG.
How do I serve WebP with a PNG fallback for older clients?
Use the HTML <picture> element with a <source type="image/webp"> first, then an <img src="…png"> fallback. Modern browsers load the WebP with its transparency, the few clients without support get the PNG, with no JavaScript needed.
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