Website image optimisation starts before an image is uploaded. A photograph should have a purpose, fit the space where it appears and contain enough detail for that job. Sending the largest available original to every visitor can add unnecessary data without improving what people actually see.
Give website image optimisation a clear goal
List the images on an important page and explain what each contributes. A project photograph may demonstrate work, while a decorative background may simply establish a mood. Prioritise the images that help customers understand the service.
For an illustrative guesthouse, room photographs need enough detail to show the space honestly. A small thumbnail in a related-post list has a different job. They should not automatically use the same file dimensions and export settings.
Choose dimensions and formats deliberately
Responsive images can let a browser select a suitable resource for its display conditions. Format and compression choices also affect image size and appearance. The web.dev image learning guide covers these concepts in detail. Ask your developer how the theme handles image variants rather than assuming that uploading a smaller file resolves every issue.
Compare the image after processing with the original at the size visitors will see. Look for blurred text, damaged fine detail or an unsuitable crop. Keep a protected original so that future edits do not have to begin with an already compressed version.
Write descriptions that match the purpose
Give informative images alternative text that communicates their relevant meaning. A project photograph might need a concise description of the work shown. Decorative images require different treatment; ask the person responsible for accessibility to review their implementation.
Avoid using image descriptions as a place to repeat a list of search terms. Captions can provide visible context when that helps everyone, such as identifying a location or explaining what changed during a project.
Check the first screen and the full page
- Is the main image relevant and correctly cropped?
- Does it remain clear on a phone?
- Are off-screen images handled appropriately?
- Does the layout reserve space for images as they load?
- Are meaningful descriptions present where needed?
Ask the developer to assess loading behaviour for prominent images. Applying the same loading rule to everything can be inappropriate. Test a representative page before making a site-wide change.
Measure changes consistently
Compare before and after using the same page and similar test conditions. Record both the measured result and the visible quality. A single performance score is a useful clue, but it should not replace checking the actual visitor experience.
If the site still feels slow, investigate the wider page: scripts, fonts, third-party content and server response may also deserve attention. Avoid repeatedly compressing an image when another component is causing the delay.
Make images part of the publishing routine
Agree a simple preparation checklist for new content. For questions about the platform serving your images, review our hosting features and contact Kilwhiss Host with the pages you want to assess.