Most website audits are long because length looks like effort. Two hundred screenshots, every crawler warning ever logged, a traffic-light matrix that gets read once. The thoroughness is real; the effect is paralysis.
The audits that change anything fit on a page. Not because the analysis was small, but because someone made decisions about it: what costs money right now, what's structural, what can wait a year. A finding you can't rank against the others isn't a finding yet — it's a data point.
The one-page constraint is a forcing function. It makes you name the problem, the evidence, the fix, and the order — and it makes the next conversation about doing the work rather than admiring its volume.
The long version still exists. Someone asks "why this order?" and you show the working. But the working is an appendix, not the deliverable. The deliverable is judgment.
I keep a sample published on this site — the format argues for itself better than this note can.