Google's Core Web Vitals algorithms directly penalize slow websites, especially those with high Largest Contentful Paint (LCP) times. Over 65% of the average webpage's total weight is composed of images.
Choosing the right format between WebP, PNG, and JPEG can cut your page load time in half.
Comparing Web Image Formats
1. WebP (Google's Recommended Standard)
- Best for: Everyday website imagery, hero banners, and blog graphics.
- Advantage: Provides 25%–35% smaller file sizes than comparable JPEGs at identical perceived quality, with native support for both lossy and lossless modes plus transparency.
- SEO Impact: Highest rating on Google Lighthouse audits.
2. PNG (Portable Network Graphics)
- Best for: Logos, icons, UI screenshots, and graphics requiring crisp text or pixel-perfect transparency.
- Drawback: Large file sizes when used for photographs or rich color gradients.
3. JPEG (Joint Photographic Experts Group)
- Best for: High-resolution photography where WebP fallbacks are required.
- Drawback: Does not support alpha transparency and suffers from artifact distortion around sharp edges when compressed heavily.
How to Convert Between Formats Instantly
Instead of downloading Photoshop or GIMP for simple conversions, you can convert images right inside your browser:
- Launch our Image Converter.
- Drop in your JPEG or PNG file.
- Select WebP as your target output format.
- Click download to receive your lightweight, SEO-ready asset.
