WebP vs PNG: Which Format Should You Choose?
When it comes to web images, choosing the right format can significantly impact your site's performance and user experience. In this guide, we compare WebP and PNG across the most important dimensions.
File Size
WebP typically achieves 25–35% smaller file sizes than PNG for lossless compression, and up to 90% smaller for lossy compression. For a website serving thousands of images, this difference compounds dramatically.
Image Quality
Both formats support lossless compression. PNG is the traditional choice for pixel-perfect graphics, logos, and screenshots. WebP lossless matches PNG quality while reducing file size.
Transparency Support
Both formats support alpha channel transparency, making them suitable for logos, icons, and UI elements with transparent backgrounds.
Browser Compatibility
- PNG: Supported in all browsers since the 1990s — universal compatibility.
- WebP: Supported in all modern browsers (Chrome, Firefox, Safari 14+, Edge). Legacy IE is the only exception.
When to Use PNG
- You need maximum compatibility with very old browsers
- Working with source files for editing
- Screenshots and diagrams where lossless is mandatory
When to Use WebP
- Your audience uses modern browsers
- You want smaller file sizes without quality loss
- Building performance-optimized web applications
Conclusion
For most modern web projects, WebP is the better choice — smaller files, same quality, broad support. Use PNG only when legacy browser support is a hard requirement.