Image Size for Web: Practical Dimensions Before Publishing
Choosing image size for the web is a balancing act. A file can be technically valid and still be too large for the page, too small for modern screens, or the wrong shape for the layout. The goal is to publish an image that fits the final placement, loads quickly, and still looks clear.
Start with the final placement
A hero image, product thumbnail, article image and author portrait do not need the same dimensions. Before exporting, decide where the image will appear and how much space it will occupy on desktop and mobile.
For many article and landing page images, a width between 1200 and 1600 pixels is a practical starting point. Hero banners may need 1600 to 2400 pixels wide, while small cards and thumbnails can often be much smaller.
Avoid oversized originals
Uploading a 5000 pixel wide image for a 700 pixel content column wastes bandwidth and can hurt page speed. Resize the image to a realistic maximum and let your website serve responsive variants when possible.
Large source files also make CMS workflows slower. A lighter asset is easier to preview, upload, cache and deliver.
Watch for blurry upscaling
If an image is too small, making it larger does not restore detail. Upscaling may fit the dimensions, but it can make edges and text look soft.
For important content such as product photos or thumbnails, start from a source image that is already larger than the target size.
Use dimensions and compression together
Dimensions control how many pixels the image contains. Compression controls how efficiently those pixels are stored. A good workflow checks both.
PublishPixel helps flag images that are too heavy, too small or mismatched for common publishing targets.