Image guides

Start with the decision you need to make

If an upload rejects your photo, first separate pixels from bytes. Then follow the upload-budget example. A byte target and a minimum width can conflict; meeting only one is not enough.

If the problem is compatibility, compare HEIC and JPG for a two-copy handoff or work through three different assets on one product page. There is no single best output format for every source.

For website publishing, start with a card-image budget. For geometry, calculate a crop in the square-resize exercise before cutting off important content.

Examples are illustrative unless stated otherwise. Reading times are estimated from article text at 200 words per minute; trying the exercises takes additional time. Each guide links to a working local-processing tool.