SEO Audit Tool

🔍 SEO Audit Tool

Crawl any website and get a 0-100 SEO score for every page and for the whole site, with every issue explained, ranked by priority and paired with a fix. Titles, meta tags, headings, canonicals, hreflang, broken links, redirects, images, structured data, speed, robots.txt, sitemaps, AI crawler rules and llms.txt, all in one run. No login, no browser extension, results as JSON, CSV or Excel.

✨ Why use SEO Audit Tool?

• 🏆 Scores you can act on: a 0-100 score per page and per site, eight category scores, and a prioritized to-do list (topIssues) that tells you what to fix first.
• 🔗 Real broken-link checks: internal and external links, canonicals and images are actually requested, so you get 404s, 5xx errors, redirect chains and oversized images, not guesses.
• 🤖 Ready for AI search: shows which AI crawlers (GPTBot, OAI-SearchBot, PerplexityBot, Google-Extended and 14 more) your robots.txt blocks, and whether your llms.txt exists and follows the format.
• 🧭 Site-wide technical checks: robots.txt syntax, XML sitemap validity, sitemap URLs that are not indexable, HTTP to HTTPS and www consolidation, soft 404s, HSTS.
• ⚡ Fast and cheap: plain HTTP crawling with parallel requests; a real browser is used only for JavaScript apps that need it.
• 📊 Duplicates found across the site: duplicate titles, meta descriptions and page content, with every page of each group listed.

🎯 Use cases

• 🧑‍💼 Agencies and freelancers: run a full technical audit for a client or a prospect in minutes and turn the JSON into a report.
• 🛠️ Developers and CI: schedule an audit after each release and alert when the site score drops or broken links appear.
• 📈 Content teams: find thin pages, missing descriptions, duplicate titles and pages that need better headings.
• 🛒 E-commerce: catch broken product links, missing structured data and heavy images before they cost rankings.
• 🤖 AI visibility: check whether AI assistants and AI search engines may crawl and cite your site.

🚀 How to use

1. Paste one or more websites under Websites to audit (for example https://example.com).
2. Set Max pages per site (20 for a standard audit, 100+ for a deep one).
3. Optionally limit the crawl with Only URLs matching / Skip URLs matching.
4. Click Start and open the Page audits and Site summaries views.
5. Export to JSON, CSV or Excel, or fetch the results through the API.

📥 Input

{
  "startUrls": ["https://books.toscrape.com/"],
  "maxPagesPerSite": 20,
  "excludeUrlPatterns": ["/tag/", "?page="]
}

📤 Output

The dataset holds two kinds of rows:

• page: one per audited page, with score, grade, categoryScores (meta, technical, content, headings, links, images, performance, structuredData), issues (each with id, severity, category, message, fix, details), title and description with length and pixel width, headings, word count, readability, keywords, indexability, canonical, hreflang, Open Graph, Twitter card, structured data types, links (broken, redirecting), images (missing alt, broken, large, sizes), performance (response time, HTML size, compression, scripts), security (HTTPS, HSTS, mixed content) and accessibility basics.
• site-summary: one per website, with the site score, averagePageScore, siteChecksScore, category averages, score distribution, topIssues ranked by priority, siteIssues, robots.txt, aiCrawlers, llmsTxt, sitemap, host checks, duplicates, broken links, error pages and crawl statistics. All summaries are also saved in the key-value store record SITE_SUMMARIES.

Example page row (trimmed):

{
  "type": "page",
  "site": "books.toscrape.com",
  "url": "https://books.toscrape.com/",
  "finalUrl": "https://books.toscrape.com/",
  "statusCode": 200,
  "score": 74,
  "grade": "needs improvement",
  "categoryScores": {
    "meta": 55,
    "technical": 77,
    "content": 45,
    "headings": 92,
    "links": 100,
    "images": 95,
    "performance": 100,
    "structuredData": 50
  },
  "issueCounts": {
    "critical": 0,
    "warning": 6,
    "notice": 6
  },
  "issues": [
    {
      "id": "THIN_CONTENT",
      "severity": "warning",
      "category": "content",
      "message": "Only 135 words of main content",
      "fix": "Add useful, original text; merge or noindex very thin pages."
    },
    {
      "id": "DUPLICATE_CONTENT",
      "severity": "warning",
      "category": "content",
      "message": "Same main text as 1 other page(s)",
      "fix": "Consolidate duplicates or point a canonical to the main version.",
      "details": [
        "https://books.toscrape.com/index.html"
      ]
    },
    {
      "id": "DESCRIPTION_MISSING",
      "severity": "warning",
      "category": "meta",
      "message": "Missing meta description",
      "fix": "Add a meta description of 70-160 characters that sells the page."
    }
  ],
  "title": "All products | Books to Scrape - Sandbox",
  "titleLength": 40,
  "titlePixels": 345,
  "metaDescription": "",
  "metaDescriptionLength": 0,
  "h1": "All products",
  "h1Count": 1,
  "headingCounts": {
    "h1": 1,
    "h2": 0,
    "h3": 20,
    "h4": 0,
    "h5": 0,
    "h6": 0
  },
  "headings": [
    {
      "level": 1,
      "text": "All products"
    },
    {
      "level": 3,
      "text": "A Light in the ..."
    },
    {
      "level": 3,
      "text": "Tipping the Velvet"
    }
  ],
  "wordCount": 135,
  "contentArea": "body",
  "textToHtmlRatio": 1.9,
  "readability": {
    "score": 79.2,
    "level": "easy",
    "formula": "Flesch reading ease (English)",
    "averageWordsPerSentence": 9.6
  },
  "topKeywords": [
    {
      "keyword": "stock",
      "count": 20,
      "density": 25.97
    },
    {
      "keyword": "little",
      "count": 2,
      "density": 2.6
    },
    {
      "keyword": "products",
      "count": 1,
      "density": 1.3
    }
  ],
  "indexable": true,
  "indexability": "indexable",
  "metaRobots": "NOARCHIVE,NOCACHE",
  "xRobotsTag": null,
  "canonical": null,
  "canonicalStatus": "missing",
  "canonicalTargetStatus": null,
  "inSitemap": null,
  "redirectChain": [],
  "hreflang": [],
  "lang": "en-us",
  "charset": "UTF-8",
  "viewport": "width=device-width",
  "openGraph": {},
  "twitterCard": {},
  "structuredData": {
    "jsonLdBlocks": 0,
    "types": [],
    "microdataTypes": [],
    "rdfaTypes": [],
    "errors": []
  },
  "links": {
    "internal": 73,
    "external": 0,
    "externalNofollow": 0,
    "emptyAnchors": 0,
    "broken": [],
    "brokenInternal": 0,
    "brokenExternal": 0,
    "redirecting": [],
    "unverified": 0
  },
  "images": {
    "total": 20,
    "missingAlt": 0,
    "missingDimensions": 20,
    "lazyLoaded": 0,
    "checked": 20,
    "broken": [],
    "large": [],
    "totalKB": 173.1,
    "items": [
      {
        "url": "https://books.toscrape.com/media/cache/2c/da/2cdad67c44b002e7ead0cc35693c0e8b.jpg",
        "alt": "A Light in the Attic",
        "hasAlt": true,
        "decorative": false,
        "hasDimensions": false,
        "lazy": false,
        "sizeKB": 9.6,
        "format": "jpeg"
      }
    ]
  },
  "performance": {
    "responseTimeMs": 382.0,
    "downloadTimeMs": 498.9,
    "renderTimeMs": null,
    "htmlSizeKB": 50.1,
    "compression": "br",
    "scripts": 5,
    "inlineScripts": 2,
    "stylesheets": 3,
    "iframes": 0,
    "images": 20
  },
  "security": {
    "https": true,
    "hsts": true,
    "mixedContent": [
      "http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"
    ]
  },
  "accessibility": {
    "ariaLabels": 0,
    "landmarks": 2,
    "formInputsWithoutLabel": 0,
    "skipLink": false
  },
  "renderedWithBrowser": false,
  "rawHtmlWordCount": null,
  "crawlDepth": 0,
  "foundVia": "start",
  "auditedAt": "2026-10-15T23:14:48+00:00"
}

Example site-summary row (trimmed):

{
  "type": "site-summary",
  "site": "books.toscrape.com",
  "startUrl": "https://books.toscrape.com/",
  "finalUrl": "https://books.toscrape.com/",
  "startRedirects": [],
  "score": 77,
  "grade": "good",
  "averagePageScore": 78,
  "siteChecksScore": 75,
  "pagesAudited": 5,
  "categoryAverages": {
    "meta": 64,
    "technical": 76,
    "content": 57,
    "headings": 92,
    "links": 100,
    "images": 95,
    "performance": 100,
    "structuredData": 50
  },
  "scoreDistribution": {
    "excellent": 0,
    "good": 3,
    "needsImprovement": 2,
    "poor": 0
  },
  "issueCounts": {
    "critical": 1,
    "warning": 23,
    "notice": 33
  },
  "topIssues": [
    {
      "id": "VERY_THIN_CONTENT",
      "severity": "critical",
      "category": "content",
      "title": "Almost no text content (under 100 words)",
      "fix": "Add real content or noindex the page.",
      "pages": 1,
      "samplePages": [
        "https://books.toscrape.com/catalogue/category/books/travel_2/index.html"
      ],
      "share": 0.2,
      "priority": 9.0,
      "rank": 1
    },
    {
      "id": "DESCRIPTION_MISSING",
      "severity": "warning",
      "category": "meta",
      "title": "Missing meta description",
      "fix": "Add a meta description of 70-160 characters that sells the page.",
      "pages": 5,
      "samplePages": [
        "https://books.toscrape.com/",
        "https://books.toscrape.com/index.html"
      ],
      "share": 1.0,
      "priority": 7.28,
      "rank": 2
    },
    {
      "id": "MIXED_CONTENT",
      "severity": "warning",
      "category": "technical",
      "title": "Mixed content (HTTP resources on an HTTPS page)",
      "fix": "Load every script, style, image and frame over HTTPS.",
      "pages": 5,
      "samplePages": [
        "https://books.toscrape.com/",
        "https://books.toscrape.com/index.html"
      ],
      "share": 1.0,
      "priority": 6.76,
      "rank": 3
    }
  ],
  "siteIssues": [
    {
      "id": "ROBOTS_TXT_MISSING",
      "severity": "warning",
      "category": "site",
      "message": "/robots.txt returns HTTP 404",
      "fix": "Add /robots.txt with your Sitemap line."
    },
    {
      "id": "SITEMAP_MISSING",
      "severity": "warning",
      "category": "site",
      "message": "No XML sitemap found",
      "fix": "Publish /sitemap.xml and list it in robots.txt."
    }
  ],
  "robotsTxt": {
    "url": "https://books.toscrape.com/robots.txt",
    "found": false,
    "status": 404,
    "sitemaps": [],
    "errors": [],
    "googlebotAllowed": "allowed"
  },
  "aiCrawlers": [
    {
      "bot": "GPTBot",
      "vendor": "OpenAI",
      "purpose": "model training",
      "status": "allowed",
      "explicit": false,
      "rule": null
    },
    {
      "bot": "OAI-SearchBot",
      "vendor": "OpenAI",
      "purpose": "ChatGPT search index",
      "status": "allowed",
      "explicit": false,
      "rule": null
    }
  ],
  "aiCrawlersBlocked": [],
  "llmsTxt": {
    "found": false,
    "url": "https://books.toscrape.com/llms.txt",
    "status": 404,
    "llmsFullTxt": false
  },
  "sitemap": {
    "found": false,
    "declaredInRobotsTxt": false,
    "sitemaps": [],
    "urlCount": 0,
    "valid": null,
    "errors": [],
    "truncated": false,
    "filesRead": 4
  },
  "hosts": {
    "https": true,
    "httpRedirectsToHttps": null,
    "httpStatus": 401,
    "alternateHost": "www.books.toscrape.com",
    "alternateHostStatus": 404,
    "alternateHostRedirects": null,
    "missingPageStatus": 404,
    "soft404": false
  },
  "duplicates": {
    "titles": [
      {
        "value": "all products | books to scrape - sandbox",
        "pages": [
          "https://books.toscrape.com/",
          "https://books.toscrape.com/index.html"
        ],
        "count": 2
      }
    ],
    "descriptions": [],
    "content": [
      {
        "pages": [
          "https://books.toscrape.com/",
          "https://books.toscrape.com/index.html"
        ],
        "count": 2
      }
    ]
  },
  "brokenLinks": {
    "internal": 0,
    "external": 0,
    "list": []
  },
  "errorPages": [],
  "crawl": {
    "pagesAudited": 5,
    "indexable": 5,
    "noindex": 0,
    "canonicalized": 0,
    "errors4xx": 0,
    "errors5xx": 0,
    "unreachable": 0,
    "nonHtmlSkipped": 0,
    "blockedByRobotsTxt": 0,
    "blockedByRobotsSample": [],
    "indexableNotInSitemap": null,
    "indexableNotInSitemapSample": [],
    "maxDepth": 1,
    "queuedNotAudited": 100,
    "linkChecks": 100,
    "imageChecks": 49,
    "renderedWithBrowser": 0,
    "residentialRetries": 0,
    "stopReason": "page limit reached",
    "durationSecs": 6.2
  },
  "averageResponseTimeMs": 188,
  "auditedAt": "2026-10-15T23:14:48+00:00"
}

💰 Pricing

You pay $0.03 per audited page ($30 per 1,000 pages), plus a small amount of platform usage (compute and proxy traffic, typically about $0.01 for a 20-page audit). A 20-page audit costs about $0.61; a 100-page audit about $3.05. Site summaries, robots.txt, sitemap, llms.txt and link checks are included. Pages that fail to load, redirects to pages already audited, files and blocked pages are not charged. Set a maximum charge per run and the audit stops cleanly when it is reached.

❓ FAQ

Is it legal to audit a website? The tool reads public pages the way a search engine does and respects robots.txt by default. Audit sites you own or have permission to analyze, and keep the crawl rate reasonable.

Do I need a login or proxy? No. Datacenter proxies are used by default; pages that block them are retried once over a residential proxy automatically.

How many pages can I audit? Up to 5,000 per site per run, because the audit keeps every page of a site in memory to compare them. Duplicate titles, descriptions and content are compared across all audited pages of a site.

Does it handle JavaScript sites? Yes. In auto mode, pages whose HTML is an empty JavaScript shell are rendered in a real browser and the page is flagged when its content needs JavaScript (which many crawlers and AI bots do not run).

Why is a field empty? Empty means the page does not have it (for example no canonical) or the check was skipped (for example image sizes when the server sends no file size).

Can I schedule it or use the API? Yes. Schedule weekly audits and compare scores over time, or start runs and read the dataset through the API.

⚠️ Limits

• Response times are measured from our crawler (through the proxy), not from your visitors; treat them as a trend, not as Core Web Vitals.
• Image weight comes from the size the server reports; images without a reported size are not weighed.
• Sites behind a login or a strong anti-bot wall cannot be audited.
• External links that answer 401, 403 or 429 are reported as unverified, not broken.
• Readability is scored for English text only.
• At most 5,000 pages per site per run: the audit keeps every page of a site in memory until the end to compare titles, descriptions and content.