Blog
Guides on image compression, PDF tools, web performance, and privacy — written by engineers who build these tools.
Your Images Are Probably the Slowest Thing on Your Website
When a page feels slow, developers look at JavaScript first. The real bottleneck is almost always the media library. Here's how to diagnose and fix it.
Responsive Images: Stop Serving Desktop Photos to Phone Screens
A single <img> tag serving one resolution to every device is one of the most wasteful patterns on the web. srcset and sizes fix this in one step.
Progressive JPEGs: The Forgotten Optimization That Still Matters
Progressive JPEG encoding makes images appear to load faster by showing a low-quality preview first. It's been around for decades but remains underused in 2026.
Lazy Loading Images: The One-Line Fix That Backfires on LCP
loading="lazy" on every image is one of the most common LCP killers. Here's why it happens and how to apply lazy loading correctly.
The Ultimate Guide to PDF Compression Levels
Screen, eBook, Printer, Prepress — what do these PDF compression presets actually mean? A technical breakdown of when to use each.
How to Pass Core Web Vitals with Optimized Images
Images are the single biggest contributor to LCP failures. A technical guide to diagnosing and fixing image-related Core Web Vitals issues.
WebP vs. AVIF: Which Image Format Is Best for SEO in 2026?
AVIF offers better compression than WebP, but encoder speed, CDN support, and browser compatibility all matter. The full 2026 comparison.