For years, PNG was the only widely compatible format that supported transparency with a full alpha channel — which made it the standard for logos, icons, and any image with a transparent background. WebP changed that: it also supports a full alpha channel (including semi-transparency and anti-aliasing at the edges), with the advantage of significantly smaller files. In 2026, the choice between the two mainly depends on where the image is headed.
Direct comparison
| Feature | PNG | WebP |
|---|---|---|
| Transparency (alpha channel) | ✅ Full alpha channel | ✅ Full alpha channel |
| Semi-transparency | ✅ 256 levels | ✅ 256 levels |
| Lossless compression | ✅ Yes (default) | ✅ Yes (explicit mode) |
| Lossy compression | ❌ No | ✅ Yes (for photos) |
| File size (simple logo) | Baseline (1×) | 20–30% smaller |
| Browser compatibility | 100% | >97% (2026) |
| Email support | ✅ Universal | ⚠️ Incomplete |
| Office/Word/PowerPoint support | ✅ Full | ⚠️ Partial (recent versions) |
| Legacy software support | ✅ Universal | ⚠️ Variable |
| Is SVG better for scalable logos? | PNG doesn't scale | WebP doesn't scale |
What's the practical difference in size
For simple logos and icons with a transparent background, lossless WebP's advantage over PNG ranges from 15% to 40% depending on the image's complexity. The simpler the logo (fewer colors, less detail), the greater WebP's relative advantage.
For images with more complex transparency — cut-out product photos with detailed edges, for example — lossy WebP with an alpha channel can be even more efficient, reaching files 50–70% smaller than the equivalent PNG with no perceptible visual loss.
📌 For logos on modern websites, SVG beats both. SVG is vector-based, scales to any size with no pixelation, and is editable via CSS. PNG and WebP are raster formats — they have a fixed resolution. Use SVG for logos on websites whenever possible, and PNG or WebP only where SVG isn't accepted. See more in SVG vs PNG.
When to use PNG
- Logos and icons for email marketing (guaranteed compatibility)
- Images inserted into Word, PowerPoint, or Google Docs documents
- When the file will be opened by users on systems that may not recognize WebP
- WhatsApp stickers (required format: transparent PNG)
- Logos for uploading to legacy platforms
When to use transparent WebP
- Logos and icons on modern websites and web applications
- Cut-out product photos in e-commerce (Shopify, WooCommerce)
- Images with transparency in banners and website sections
- Any use where PNG would be chosen and the destination is the modern web
Convert PNG to WebP — or vice versa
The conversion preserves the alpha channel — transparency is kept in the output file.
Convert image for free