PNG vs WebP: Which Image Format Should You Use?
WebP is generally the better choice for web images — it produces files 25–35% smaller than PNG while supporting transparency, lossless mode, and animation. PNG remains the safe pick when you need universal compatibility or are targeting non-web environments.
PNG vs WebP — Feature Comparison
| Attribute | PNG | WebP |
|---|---|---|
| Compression type WebP supports both modes; PNG is strictly lossless. | Lossless only | Lossless + Lossy |
| Typical file size Google's own benchmarks show ~26% reduction on lossless, ~34% on lossy. | Baseline | 25–35% smaller |
| Transparency (alpha) | Full 8-bit alpha | Full 8-bit alpha |
| Animation support | APNG (limited support) | Animated WebP (native) |
| Browser support PNG works everywhere including legacy IE. WebP requires Chrome 32+, Firefox 65+, Safari 14+. | Universal (100%) | 97%+ modern browsers |
| Colour depth Relevant only for HDR or print workflows. | Up to 48-bit | Up to 32-bit |
| Best for | Logos, icons, screenshots | Web photos, UI assets |
| Metadata support | Limited (tEXt chunks) | EXIF + XMP + ICCP |
When to Use Each
Choose PNG when…
Use PNG for universal compatibility, print, design tools, or images that need 48-bit colour.
Choose WebP when…
Use WebP for web images where you want the best file-size-to-quality ratio.
Frequently Asked Questions
Is WebP better than PNG for SEO?
Yes, in most cases. Smaller WebP files load faster, which improves Largest Contentful Paint (LCP) — a Core Web Vitals metric that Google uses in ranking. Use WebP for web-facing images and serve PNG only as a fallback for older browsers using the <picture> element.
Does WebP support transparency like PNG?
Yes. WebP supports full 8-bit alpha transparency, the same as PNG. Both formats handle transparent backgrounds equally well.
Can I convert PNG to WebP without quality loss?
Yes — use WebP lossless mode. The output will be visually identical to the PNG source, while still being smaller due to better compression algorithms.
When should I still use PNG instead of WebP?
Use PNG when: (1) you need to support very old browsers without a <picture> fallback, (2) your workflow requires 48-bit colour depth, (3) you are distributing images outside the browser (print, design tools, email).
Is WebP supported in all browsers?
WebP is supported by Chrome, Firefox, Edge, Safari 14+, and Opera — covering 97%+ of global browser usage. Internet Explorer does not support WebP, but IE market share is below 1%.
Related Developer Tools
Related Comparisons
WebP vs AVIF
AVIF offers 20–50% better compression than WebP, but encodes slower and has slightly lower browser support. Learn when to choose AVIF vs WebP for your web images.
JPG vs PNG
JPG uses lossy compression for small files; PNG uses lossless compression for perfect quality. Choose JPG for photographs, PNG for graphics, logos, and images with transparency.