Understanding Image Formats
Choosing the right image format is crucial for website speed and SEO rankings. Here is the breakdown.
1. JPG (JPEG)
The standard for photography. JPG uses "lossy" compression, meaning it throws away some visual data to reduce file size. It's great for photos but bad for text. If you have a massive PNG photo, you should convert it to JPG to save space.
2. PNG
Lossless compression that supports transparency. Best for logos, screenshots, and graphics with text. However, PNG files can be huge. If you don't need transparency, switching to JPG is usually better.
3. WebP (The Winner)
WebP is the modern champion developed by Google. It supports both lossy and lossless compression and transparency.
- Performance: It is typically 26% smaller than PNGs and 25-34% smaller than JPEGs.
- SEO: Google explicitly recommends using WebP for better PageSpeed scores.
Recommendation: If you are building a website today, you should convert your assets to WebP. It's the single most effective optimization you can make for image-heavy sites.