Modern phones can create images much larger than a website needs to display. Uploading every original file may make a portfolio slower to load, especially for visitors on mobile connections.
Prepare a web-sized copy
Keep your original photographs, then make a resized copy for the website. Choose dimensions appropriate to the image's display size and compress it with a format supported by your site. Check the result at desktop and phone widths; excessive compression can make details look poor.
Avoid unnecessary image weight
Remove duplicate shots, use only images that add value, and avoid uploading several full-resolution versions of the same view. Use descriptive filenames and alternative text where appropriate, but do not treat either as a substitute for image quality or page usefulness.
Ask your site provider to check loading
Modern sites may use responsive images, lazy loading below the first screen and a content delivery network. Ask whoever maintains the website whether those features are configured and test representative pages. Do not lazy-load the main image at the top of the page without understanding the effect on loading.
Google's Core Web Vitals guidance explains user-focused performance measures. Passing a test does not guarantee a ranking; the goal is a faster, easier experience. See our mobile-friendly website checklist and job photo checklist.