The population contains one latest completed report per canonical public page. A report must pass the public index-eligibility policy, include a verified HTML response, contain sufficient check evidence, have complete category scores, and not be disabled or challenged.
Scores are produced by the published FreeScan scoring methodology. The median is the 50th percentile. The middle 50% runs from the 25th to the 75th percentile. Histogram bands are fixed ten-point ranges, with 100 included in the 90 to 100 band.
Each canonical page contributes once, so repeated rescans do not increase its weight. The population grows as new eligible pages are scanned. Aggregates are cached for up to one hour, and the displayed completion window identifies the underlying report period.
Common-check failure rates use only reports that contain the named check. This prevents a check introduced in a newer scanner version from being counted as absent or passed in older reports.
These statistics describe pages in the FreeScan public dataset. They are not a random sample of all websites and do not prove that a score causes traffic, rankings, accessibility conformance, security, or conversion outcomes.
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Eligible public reports are added to future aggregates automatically. The benchmark never changes how an individual scan is scored.
