PageLint

Paste a URL and get 55 checks across 9 copywriting lenses. Every finding quotes your page, proposes a concrete fix, and cites its source: Ogilvy, Cialdini, Schwartz, CXL. Free quick audit: 16 checks, no signup, about a minute. Full report $29 one-time. New since v1: all 9 lenses live, payments, and a public teardown gallery of 12 famous SaaS landings.