Resize an image to the dimensions your page needs, choose an appropriate output format and adjust compression. Compare the exported image at its intended display size before downloading and publishing.
Choose dimensions before quality
Keep the original and estimate the largest display size, including high-density screens. Excess pixels increase transfer size. Avoid enlarging a small source in the hope of recovering detail; interpolation cannot recreate missing information.
Choose a format for the content
JPG is useful for photographs without transparency. PNG preserves transparency but may be larger. WebP can reduce photo size where supported. Inspect the actual browser export and file size rather than assuming one format always wins. JPG output flattens transparent areas onto white.
Compare the exported result
Review text edges, gradients, faces and transparent boundaries at the intended display size. Reduce quality gradually and stop when artefacts become distracting. Download and reopen the exported file; a smaller image is useful only if it still communicates clearly.
Publish with page context
Use descriptive filenames, meaningful alt text where the image conveys information, and explicit rendered dimensions to reduce layout movement. Decorative images can use empty alt text. Compression is browser-local; original metadata is not copied. Validate the deployed page separately for loading speed and accessibility.
Tools for this workflow
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