Website SEO Audit — On-Page Analyzer for Title, Meta, Core Web Vitals & Issues

Audit any page's on-page SEO in seconds — or crawl a whole site. Get the title, meta description, headings, link counts, word count, Core Web Vitals, an on-page score, and a prioritized list of issues — for one URL, a list, or an entire website.

Two modes: instant (audit the exact URLs you give it) and crawl (point it at a domain and it crawls the site, returns a per-page audit, and a site-wide summary). Perfect for site audits, client reports, migrations, and pre-publish QA.

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Two modes

• Instant — paste a list of page URLs; get one audit row per URL.
• Crawl — give one starting URL/domain + a page cap (up to 50); get a per-page audit for every crawled page plus a site-summary row (avg score, pages with issues, broken links, 4xx/5xx counts).

What you get per page

• 🏅 On-page score (0–100) — overall health at a glance.
• 🏷️ Title & meta description — text + length, plus duplicate-title / duplicate-description flags.
• 🔠 H1 & headings — first H1 and heading count.
• 🔗 Internal, external & broken links — link structure and broken-link count.
• 🧱 Word count, canonical, HTTPS, structured-data presence, redirect flag.
• ⚡ Core Web Vitals & timing — TTFB, DOM complete, LCP, CLS, total load time, HTTP status.
• 🚩 Issue list — missing titles/descriptions, no H1, missing alt text, slow load, redirects, 4xx/5xx, and more.

What you get for the whole site (crawl mode)

• Site on-page score and average page score.
• Pages crawled, pages with issues, 4xx/5xx page counts.
• Site-wide broken links / broken resources, duplicate titles & descriptions.

Perfect for

• SEO audits — bulk-check a whole site or a content batch.
• Client reports — export a clean, professional issue list.
• Pre-publish QA — catch missing meta and broken pages before they go live.
• Migrations — verify titles, canonicals, and status codes after a move.
• AI agents — feed structured audit data into automated SEO workflows and MCP tools.

How to use it

1. Pick a mode: instant (list of URLs) or crawl (one site).
2. Instant: paste your page URLs. Crawl: set target + maxCrawlPages.
3. Optionally enable JavaScript rendering for JS-heavy sites.
4. Run it — export JSON/CSV or pull via the API.

Example input — instant

{ "mode": "instant", "urls": ["https://example.com", "https://example.com/pricing"], "enableJavaScript": false }

Example input — crawl

{ "mode": "crawl", "target": "https://example.com", "maxCrawlPages": 25 }

Example output (one row per page)

{
  "type": "page",
  "url": "https://example.com",
  "onpage_score": 92,
  "status_code": 200,
  "title": "Example — Home",
  "title_length": 14,
  "description_length": 0,
  "h1_count": 1,
  "word_count": 612,
  "internal_links": 24,
  "external_links": 3,
  "broken_links": 0,
  "is_https": true,
  "canonical": "https://example.com/",
  "duplicate_title": false,
  "largest_contentful_paint_ms": 1240,
  "cumulative_layout_shift": 0.02,
  "load_time_ms": 180,
  "issues": ["no_description"],
  "issue_count": 1
}

In crawl mode the first dataset row is a site-summary with site-wide metrics.

Pricing

Pay per page — no monthly fee, no minimum. Instant pages and crawled pages are billed per page; audit 5 pages or 5,000 and pay only for what you check.

FAQ

Can it crawl a whole site? Yes — use crawl mode with a starting URL and a page cap (up to 50). Use instant mode to audit a specific list of URLs.

Can it render JavaScript? Yes — toggle JavaScript rendering for SPA/JS-heavy pages.

What issues does it detect? Missing/long/short titles & descriptions, missing H1, missing image alt text, slow load, redirects, 4xx/5xx, and more.

Good for AI agents? Yes — clean JSON, ideal for MCP servers, n8n, Make, and LLM agents.

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Tags: seo audit, on-page seo, site audit, technical seo, meta tags checker, seo analyzer, page speed, seo issues, website audit, seo crawler.