Images are the heaviest thing on your blog — often 60-80% of total page weight. A single unoptimized photo can be 5 MB, while the rest of your page (HTML, CSS, fonts) might total 200 KB. Here's how to fix that in 3 steps.
The most common blogging mistake: uploading a 4000-pixel-wide photo into a 800-pixel-wide content area. The browser downloads the full 4000px image, then scales it down. You paid for all those pixels your readers never see.
Rule of thumb: if your blog content column is 800px wide, resize images to 800-1600px (2x for retina screens). Anything beyond that is wasted bytes. Use your OS's built-in image tools or any online resizer.
Drag your resized, correctly-formatted image into Compress2PNG. At 85% quality for JPG or lossless for PNG, you'll typically see 50-70% reduction with no visible quality loss. For a blog post with 5 images, that's the difference between a 3-second page load and a 0.8-second load.
Google's Core Web Vitals measure LCP (Largest Contentful Paint) — basically, how fast your biggest image loads. Blogs with unoptimized images fail this metric, and Google demotes slow pages. Compressing images is one of the highest-ROI SEO actions you can take, right after writing good content.
Before uploading any image to your blog: Resize to display width × 2 → Convert to correct format → Compress at 85% quality. Three steps, 20 seconds per image, and your blog loads fast on every device.