The Common Website Image Mistake
A lot of site owners upload the original asset and let CSS deal with it. That works visually, but it still ships an oversized file to the browser. The page looks fine and performs badly.
The right move is to prepare the image for the size it will actually render.
How to Resize an Image for a Website
Step 1: Find the real display size
Check how wide the image actually appears on the page. If the container is 1200 pixels wide, you usually do not need a 4000-pixel source image.
Step 2: Resize the asset
Use Image Resizer to match the real use case instead of guessing.
Step 3: Compress the resized image
After resizing, run it through Image Compressor so you are not serving unnecessary bytes.
What Size Is "Right"?
There is no universal number. A blog hero, a product card, and a profile image all need different dimensions. The mistake is not choosing one. The mistake is uploading something much larger than the layout ever displays.
The Practical Workflow
For most website assets: resize first with Image Resizer, then compress with Image Compressor. That is the simplest way to protect both layout quality and page speed.