For many e-commerce platforms and high-speed blogs, is considered the "gold standard" for thumbnail or medium-sized images.
If you're working on a project, I can help you further if you tell me: Are you trying to of 40 images?
Never upload a 4000px wide image and expect a compression tool to save you. Scale the image to the exact width needed for your website (e.g., 800px). 2. Use Chroma Subsampling 40 jpg
Google's Core Web Vitals prioritize Largest Contentful Paint (LCP). Keeping hero images around this size significantly boosts rankings.
Are you trying to for a specific website (like Shopify or Amazon)? For many e-commerce platforms and high-speed blogs, is
At settings lower than 40, you may see "ghosting" or "blockiness" around high-contrast edges.
The image contains , which will become blurry or illegible. Scale the image to the exact width needed
For mobile users with limited data plans, 40KB images ensure they can browse your site without draining their allowance. 2. The 40% Compression Ratio
Every JPG contains "EXIF" data—the camera model, GPS coordinates, and date. This can add 5–10KB to a file. Use a tool like TinyJPG to strip this hidden weight. When to Avoid the "40" Setting
The image has (like a sunset), as "banding" will occur at lower quality levels.