WebP vs PNG: Which Lossless Format Wins?
Comparing two formats that excel at lossless compression and transparency
Overview
PNG and WebP both support lossless compression and alpha transparency, making them direct competitors for graphics, icons, and screenshots. PNG has been the standard since 1996, while WebP offers modern compression that produces smaller files. With 97%+ browser support, WebP is now a practical alternative for web delivery.
Feature Comparison
| Feature | WebP | PNG |
|---|---|---|
| Lossless compression | Yes (20-30% smaller) | Yes (baseline) |
| Lossy compression | Yes | No |
| Transparency | Yes (alpha) | Yes (alpha) |
| Animation | Yes | Via APNG |
| Color depth | 8-bit | 8/16-bit |
| Browser support | 97%+ | 100% |
| Editing support | Good | Universal |
| Maximum dimensions | 16383 × 16383 | Virtually unlimited |
When to Use WebP
Choose WebP for web delivery of graphics, icons, and screenshots where file size matters. WebP's lossy mode is particularly useful when you can accept slight quality loss for dramatically smaller files — something PNG cannot offer at all.
When to Use PNG
Choose PNG when you need universal compatibility across all software and platforms. PNG is essential for print workflows, image editing (all editors support PNG natively), and when sharing source assets with others.
The Best of Both Worlds
For web projects, keep your source assets as PNG for editing and generate WebP versions for delivery. Use the HTML <picture> element or your CDN's automatic format negotiation to serve WebP to supported browsers.
Ready to convert? Try our PNG to WebP or WebP to PNG converters — free and 100% private.
Frequently Asked Questions
Yes. WebP lossless files are typically 20-30% smaller than equivalent PNG files while maintaining identical pixel quality. For lossy WebP, the savings are even greater at 60-80% smaller.
Yes. WebP supports full alpha transparency just like PNG. Both formats handle smooth semi-transparent edges and gradients equally well.
For web delivery, yes. For editing workflows, print, and archival, PNG remains the safer choice due to universal software support. Keep PNG source files and serve WebP on the web.
Yes. WebP supports animation and is widely supported in browsers. Animated WebP files are significantly smaller than equivalent APNG or GIF animations.