How to Reduce Image File Size in KB

The most effective way to shrink file size is to resize the image to its actual display size and then compress it. Resizing alone removes pixels that do not contribute to the final image.

A photo displayed at 800 px wide does not need to be stored at 4000 px wide. Resize first, then compress to a quality setting of 75–85 for photos.

WebP often produces significantly smaller files than JPG at the same visual quality. If the target platform supports WebP, converting from JPG to WebP during compression usually saves 25–35% more space.

PNG files compress poorly with lossy methods. If you have a PNG photo that needs to be small, convert it to JPG or WebP instead.