The Most Compatible Web Dimension
Before the era of 4K monitors, 800x600 was the standard resolution of the entire internet. Today, it remains one of the most useful dimensions for general web use. An 800x600 image is large enough to show clear detail in a blog post or email, but small enough to load instantly on slow mobile connections. Many online forums, legacy CRM software, and classified ad sites (like Craigslist) still prefer or require this exact size for photo uploads.