Images all load at once
38.2%
of the 3,044 free scans considered in the last 30 days raised this finding. That is 1,164 scans across 1,157 distinct sites. 95% interval 35.5% to 41.1%.
What it means
Loading every image immediately, including ones off-screen, competes for bandwidth with the content a visitor can actually see.
How to fix it
Add loading="lazy" to images below the first screen, so the browser fetches them only as a visitor scrolls near them.
How to check it yourself
Open DevTools, go to Network, reload the page, and watch whether images below the fold download immediately or wait until you scroll to them.
What fixed looks like
Images below the first screen download only as you scroll near them in the Network panel.
How we measured this
Go Voltic scans a site and records which findings it raises. The share above is over every free four-page scan in the last 30 days that loaded at least one page, which is 3,044 scans. Deep scans of paid reports and of the research sweep read a site at a different depth and are a separate population, never in this denominator. It is not a survey and it is not an estimate: it is a count of what our own scanner found. Sites are counted once each in the distinct-sites figure, so a site scanned twice does not weigh double there.
The interval is a 95% Wilson interval. A share printed without its sample size reads as certainty and is indistinguishable from a guess, so both are always shown. Figures on this page were computed on 2026-09-08.
The same share sits beside every other finding on the benchmarks page, which also carries the whole table as CSV and JSON and says how to cite it.
Check your own site
The free scan reads four pages and reports every finding it raises, including this one. It takes about ten seconds and asks for nothing but the address.