Image Optimization: The Secret to Lightning-Fast Sites

Why images matter

Images account for more than half of the average web page’s weight. If your images aren’t optimized, even the most beautiful site can feel slow and unresponsive. Uncompressed, outdated formats and oversized files are the most common culprits behind sluggish load times.

Jet’s image optimization dropped our homepage load time by 1,5 seconds—no manual work needed.

The hidden cost of slow images

A slow-loading image can cost you more than just a few seconds—it can cost you sales, users, and search rankings. According to recent studies, 39% of users will stop engaging with a website if images take too long to load. That’s why modern image optimization isn’t just a technical detail—it’s a business priority.

Image formats table

Actionable tips

Optimizing your site’s images doesn’t have to be complicated. By following a few best practices, you can drastically improve your load times and user experience. Here’s where to start:

• Compress and convert images to next-gen formats (WebP, AVIF)
• Use responsive image sizes for different devices
• Implement lazy loading for images below the fold
• Serve images through a CDN for instant global delivery

Example: Lazy loading

<img src="photo.webp" loading="lazy" alt="Optimized photo">

Jet's approach

Jet handles all of this behind the scenes. Upload your images and let Jet do the rest—no plugins, no manual work.