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Engineering guides on image compression, PDF tools, web performance, and zero-upload file privacy.
Performance & SEO: 8 articles
Local Image Compression: Why Processing on Your Device Is Often Faster, Too
Local image compression means your photo is compressed on your own device instead of a server. Here is what that means for quality, speed, and privacy, with a real-world comparison.
Your Images Are Probably the Slowest Thing on Your Website
Developers check JS first when pages are slow. Images are almost always the real bottleneck. Five DevTools steps identify exactly which images to fix.
Progressive JPEGs: The Forgotten Optimization That Still Matters
Progressive JPEGs show a full-image blurry preview instantly, then sharpen. They're 2–8% smaller than baseline and make images feel faster. Here's how to use them.
Responsive Images: Stop Serving Desktop Photos to Phone Screens
Serving a 2 MB desktop photo to every mobile screen wastes 95% of bandwidth. Add srcset, sizes, and picture in minutes to cut mobile load time in half.
Lazy Loading Images: The One-Line Fix That Backfires on LCP
loading="lazy" on your hero image is one of the most common LCP killers. Here's exactly why it happens, how to find it, and how to fix the damage.
The Ultimate Guide to PDF Compression Levels
Screen, eBook, Printer, Prepress, what these PDF compression presets actually do, which to use for email vs print, and how to shrink any PDF without ruining quality.
How to Pass Core Web Vitals with Optimized Images
Images cause 70% of LCP failures. This step-by-step guide diagnoses and fixes image-related Core Web Vitals issues to improve your Google ranking.
WebP vs. AVIF: Which Image Format Is Best for SEO in 2026?
AVIF compresses smaller than WebP but encodes 10× slower. Find out which format wins for LCP, CDN support, and real-world SEO in this 2026 comparison.