Landing Page Critic
Paste any URL. An AI agent opens it in a headless browser, scores 8 dimensions of landing-page craft, and writes a critique with one specific fix per dimension.
Recently critiqued
What this proves
AI that sees your landing page the way your users do, in 30 seconds, for free.
How it works
Paste a URL. Get an AI-scored critique of your landing page in under a minute. No signup, no friction.
The interesting part
Most landing-page critiques are either expensive UX audits (weeks, $5K+) or generic checklists you have to self-evaluate against. This build sits in between: it opens your page in a real browser, captures desktop and mobile views, and reasons about what a first-time visitor would see.
What gets scored
Eight dimensions, each graded 0-10 with a 2-3 sentence critique and one specific fix:
- Above-fold clarity - in 5 seconds, can a first-time visitor tell what this is?
- Value proposition - is the main benefit sharp, specific, believable?
- Social proof - logos, testimonials, numbers, case studies visible?
- CTA visibility - primary CTA above fold, contrasting, clear copy?
- Copy quality - active voice, no jargon, specific not vague
- Design polish - visual hierarchy, typography, spacing, consistency
- Accessibility - color contrast, alt text, semantic HTML
- Performance - observable load speed, image weight, render-blocking
Overall score is the average. Letter grade A through F.
How it works
- Submit a URL
- A Vercel Function launches headless Chromium via Playwright
- Captures desktop (1440x900) and mobile (390x844) screenshots, extracts above-fold HTML
- Sends both to Claude Sonnet 4.6 with a strict 8-dimension rubric
- Returns structured JSON, validated, saved, permalinked
Results cache for 7 days per URL. Rate-limited to 5 critiques per visitor per day.
Built with
- Next.js 16 App Router
- Playwright + @sparticuz/chromium (serverless Chromium)
- Claude Sonnet 4.6 via Vercel AI SDK (multimodal)
- Postgres via Prisma (critique cache + rate limits)
- Vercel Blob (screenshot storage)
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