The Complete Guide to Image Optimization for Web

By Zlatko Marjanovic10 min readUpdated January 2024

Note: This is a comprehensive guide covering all aspects of image optimization. Use our free ZipImg tool to apply these techniques to your images.

Introduction

Image optimization is one of the most critical aspects of web performance. With images accounting for approximately 50% of a typical webpage's total size, optimizing them can dramatically improve load times, user experience, and SEO rankings.

Why Image Optimization Matters

Optimized images provide numerous benefits:

  • Faster page load times leading to better user experience
  • Improved SEO rankings through better Core Web Vitals scores
  • Reduced bandwidth costs and server load
  • Better mobile experience with smaller file sizes
  • Lower bounce rates due to improved performance

Image Formats Explained

Understanding different image formats is crucial for optimization. Each format has its strengths and use cases. This section will be expanded with detailed format comparisons and recommendations.

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