Convert photographs for a faster website

Page weight is usually a photograph problem, not a code problem. A single untouched camera file can outweigh every stylesheet on a site, and it is the asset visitors wait for on a slow connection. This job covers the conversion routine a web editor repeats: choose the modern container, decide a quality that survives a retina screen, then compare the measured weight instead of trusting a slider. It also covers the awkward cases, such as a translucent logo that must not gain a background, or a hero image that is already compressed and will barely shrink. Everything is processed locally, so unpublished campaign imagery stays private while you experiment. Finish by re-checking the pages that use the picture, because a lighter file only helps if the markup points at it. Judgement matters more than the slider. A portrait, a product on a plain backdrop and a photograph of dense foliage all tolerate different amounts of compression, so evaluate each asset instead of applying one setting everywhere. Compare the produced weight with the original before replacing anything, because an already lean file has little left to remove and a very high quality can add bytes. Watch for assets that must never gain a background, since translucent marks depend on the alpha channel surviving. Keep the source format for anything destined for print and reserve the modern container for screens. Note the settings beside the asset, so a colleague can reproduce a conversion later without reopening this workflow from memory. Speed is the reason for the whole exercise, so measure at the end rather than assuming. Reload the page with the cache disabled and watch when the largest image appears; if it still trails the text, the next candidate is the second heaviest picture, not more aggressive compression on the first. Serve what the device can use, keep decorative images out of the critical path, and never let a format decision break an older browser. If a client wants an original kept for archival reasons, store it beside the optimised export and document which is which.