Asset Delivery Optimization
Images are responsible for 60–80% of most WordPress page weight. We reduce that number significantly.
Unoptimized images are the single most common cause of slow WordPress sites, and the single easiest win when done correctly. We convert, resize, compress, and deliver your images properly, using modern formats and responsive delivery techniques that most WordPress sites haven't implemented.
The 4MB Hero Image Your Mobile Users Are Downloading
Someone on your team uploaded a hero image to WordPress. The source file was a 6000×4000 pixel photograph taken on a DSLR or downloaded from a stock photography site. WordPress generated three or four additional sizes automatically. The original file, at 4–6MB, remained in the media library.
WordPress is serving that 4MB image, or something close to it, to a visitor on a mobile phone with a 390px screen. They're downloading a file that's 10 times larger than what their screen can actually display, on a connection that may be slower than your office WiFi.
This single issue accounts for the majority of slow load times on the majority of WordPress sites. And it's entirely fixable.
Why Built-in WordPress Compression Isn't Enough
WordPress automatically generates multiple image sizes when you upload a file. What it doesn't do:
- Convert images to modern formats (WebP or AVIF) that achieve 25–50% smaller file sizes at equivalent quality - Apply optimal compression to the generated image sizes - Serve appropriately sized images to different viewport widths (responsive images with proper srcset) - Lazy load images below the fold to prioritize loading of visible content
Most "image optimization plugins" address some of these issues. They rarely address all of them correctly, particularly responsive image delivery, which requires proper `srcset` and `sizes` attributes that many plugins generate incorrectly.
Asset Optimization Implementation
Image Format Conversion
- Bulk conversion of existing media library to WebP format - Automatic WebP conversion for new uploads with AVIF fallback where browser support allows - JPEG fallback maintained for older browsers
Responsive Image Delivery
- Audit and correct `srcset` attributes to ensure appropriate image sizes are served to each viewport - Configure WordPress image size generation to produce sizes matching your actual layout breakpoints - Implement `sizes` hints to help browsers select the correct source image
Lazy Loading
- Implement native browser lazy loading for all below-fold images - Ensure above-fold (LCP) images are NOT lazy loaded, a common mistake that degrades LCP - Implement lazy loading for embedded videos, maps, and iframes
CDN Configuration
- Configure a Content Delivery Network to serve images and static assets from edge locations close to your visitors - Implement proper cache headers for long-term asset caching - Configure CDN image transformation for dynamic resizing where appropriate
Post-Mortem Report
Case Study: The Photography Portfolio Losing Mobile Visitors
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Get a Free AuditCommon questions
Questions answered.
Will image optimization reduce the quality of my photos?
Modern compression algorithms (especially for WebP) maintain visual quality that is indistinguishable to the human eye while significantly reducing file size. We tune compression settings to achieve the optimal balance for your specific image types.
What about images I've already uploaded — do they need to be re-optimized?
Yes. We bulk-process the existing media library as part of the optimization. All images, past and future, are delivered in optimal format and size.
I use a page builder with a gallery. Will optimization work with my builder?
Yes. We ensure that optimization integrates correctly with your specific page builder (Elementor, Divi, WPBakery, etc.), as each handles image output differently and requires specific configuration.
What is a CDN and do I need one?
A CDN (Content Delivery Network) stores copies of your static assets on servers around the world, serving files from a location close to each visitor. For sites with a geographically distributed audience, a CDN meaningfully reduces load times. We assess whether a CDN is appropriate for your traffic profile.
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