I kept hitting the same wall: every SEO tool either paywalls the useful parts or caps you at a few pages. So I built a free one —
freeseoaudit.vercel.app. No signup, no crawl limit, open source.
## What it checks
Paste any URL and it streams a report across 40+ checks in 8 categories:
- Metadata — titles, descriptions, canonicals, Open Graph
- Structured data (JSON-LD) — validates schema against Google's rich-result rules
- Crawl & indexing — robots.txt, sitemap, hreflang
- Core Web Vitals and security headers
- GEO / AEO — the part I care most about
## Why GEO/AEO?
Search is splitting in two. Classic SEO gets you blue-link rankings; GEO (Generative Engine Optimization) gets you cited
inside AI answers — ChatGPT, Perplexity, Google AI Overviews. The two now share under 20% of their winners.
So it checks things most SEO tools ignore:
-
llms.txtpresence + spec conformance - Whether you're accidentally blocking GPTBot / ClaudeBot / PerplexityBot in robots.txt
- The "Island Test" — are your paragraphs self-contained enough for an AI to lift as a citation?
- Direct-answer detection and E-E-A-T signals
## Stack
Next.js 15 + React 19 on Vercel; Node + Express + TypeScript on Render. SSRF-hardened crawler, optional Playwright rendering,
results streamed over SSE. Runs entirely on free tiers.
## Try it
freeseoaudit.vercel.app — paste your site and see. Free, stays free. Feedback very welcome,
especially on the GEO checks — useful or gimmick?
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