Resize before compressing
An image delivered at 3000 pixels but displayed at 900 pixels wastes bandwidth. Resize close to the largest real display size, while accounting for high-density screens when appropriate.
Choose quality by inspection
Nominal quality values are not equivalent across formats or encoders. Export representative settings, inspect detail and gradients, and keep the smallest result that remains acceptable for its purpose.
Validate the output
Open the result again, confirm dimensions and transparency, and measure real bytes. Keep source originals outside the delivery folder so you can regenerate later.
Try the related local tools
This guide describes format behaviour and product capability, not a guarantee for every source image or third-party workflow. Keep your original files and verify important exports.