SEO Meta Tag Checker (robots.txt-respecting)

Check the on-page SEO basics of a list of URLs in one run: title, meta description, canonical, H1, indexability (meta robots and X-Robots-Tag), Open Graph, viewport, lang, hreflang and images without alt. Each page comes back as one row with a plain-English issues list, so you can sort and fix.

Built for site owners, SEO freelancers and agencies auditing sites they own or are authorised to audit.

Polite by design

• robots.txt is always obeyed and cannot be switched off. Disallowed URLs are reported as skipped and never requested, including when a redirect points into a disallowed path.
• If robots.txt cannot be reached (server error or network failure), the whole site is treated as disallowed, as RFC 9309 recommends.
• At least 1 second between requests to the same site (default 2 s). A longer Crawl-delay in robots.txt is honoured.
• Only the URLs you list are fetched. Links are not followed, nothing behind a login is accessed, and no personal data is extracted.
• The User-Agent identifies the tool: SeoMetaChecker/1.0. Site owners can block it in robots.txt.

Input

{
  "startUrls": [{ "url": "https://example.com/" }, { "url": "https://example.com/pricing" }],
  "delaySeconds": 2
}

Output (one row per URL)

{
  "url": "https://example.com/pricing",
  "finalUrl": "https://example.com/pricing",
  "status": 200,
  "redirectChain": [],
  "title": "Pricing – Example",
  "titleLength": 17,
  "description": null,
  "descriptionLength": 0,
  "canonical": "https://example.com/pricing",
  "canonicalIsSelf": true,
  "indexable": true,
  "h1": ["Simple pricing"],
  "h1Count": 1,
  "ogTitle": "Pricing", "ogImage": null,
  "imagesWithoutAlt": 2,
  "issues": ["Missing meta description", "Incomplete Open Graph (og:title / og:image)", "2 image(s) without alt"],
  "blockedByRobots": false,
  "error": null
}

Export as CSV / Excel / JSON, or schedule the Actor weekly to catch regressions after a deploy.

Checks

Check	Flagged when
Title	missing, under 10 or over 60 characters
Meta description	missing, under 50 or over 160 characters
H1	none, or more than one
Canonical	missing, or points to a different URL
Indexability	noindex in meta robots or X-Robots-Tag
Language / mobile	missing <html lang> or viewport meta
Social	missing og:title or og:image
Images	<img> without alt
Redirects	more than one hop

Length limits are common guidelines, not Google rules.

Pricing

Pay per event, platform usage included:

Event	Price
Actor start	$0.01 per run
page-checked – one page checked successfully	$2.00 per 1,000 pages

URLs skipped because of robots.txt, errors or non-HTML responses are not charged. Example: auditing 500 pages costs $0.01 + $1.00 = $1.01.

日本語での説明

自分のサイト（または監査を任されたサイト）のURLを並べると、タイトル・説明文・canonical・H1・noindex・OGPなどをまとめて点検し、問題点を一覧にします。robots.txt は必ず守り（オフにできません）、同じサイトへは最低1秒あけてアクセスします。リンクはたどらず、ログインが要るページや個人情報は扱いません。