> ## Documentation Index > Fetch the complete documentation index at: https://docs.nometria.com/llms.txt > Use this file to discover all available pages before exploring further. # SEO Audit Tools > Free SEO tools to check meta tags, structured data, sitemaps, and more. Nometria's SEO tools help you ensure your vibe-coded app is findable and shareable. All tools are free at [nometria.com/tools](https://nometria.com/tools). ## Full SEO Audit The comprehensive audit runs all checks at once and returns a prioritized list of issues. **What it checks:** * Title tag (length, uniqueness, keyword presence) * Meta description (length, call-to-action, truncation) * Open Graph tags (`og:title`, `og:description`, `og:image`, `og:url`) * Twitter Card tags * Heading hierarchy (H1 required, no skipped levels) * Canonical tag (present, correct, not self-referencing with params) * Structured data (JSON-LD presence and validity) * Robots.txt (accessible, not blocking crawlers) * Sitemap (linked in robots.txt, accessible, valid XML) * Page speed (Largest Contentful Paint, Cumulative Layout Shift) **How to use:** Enter your URL → audit runs → download report as PDF or JSON. *** ## Meta Tag Analyzer Paste a URL or raw HTML to inspect all meta tags in detail. Returns: * Parsed title, description, all `og:*` and `twitter:*` tags * Character counts with good/warning/bad thresholds * Missing recommended tags * Duplicate tag detection *** ## OG Preview Preview how your page looks when shared on: * **Twitter/X** — summary card and large image card * **LinkedIn** — article format * **Slack** — link unfurl * **WhatsApp** — link preview * **Facebook** — feed post format Requires `og:title`, `og:description`, and `og:image` to be set. Returns a visual mockup for each platform. **Common issues for vibe-coded apps:** * `og:image` pointing to a relative path (must be absolute) * Missing `og:image:width` and `og:image:height` (causes cropping on some platforms) * `og:image` served over HTTP (must be HTTPS) *** ## JSON-LD Generator Generate `application/ld+json` structured data markup for: * **WebSite** — with SearchAction sitelinks * **WebPage** / **Article** — for blog posts * **Product** — with price, rating, availability * **Organization** — with logo, social profiles * **BreadcrumbList** — for multi-level navigation * **FAQPage** — for FAQ sections Output is copy-paste ready. Paste it into your `` or into Mintlify's `` component. *** ## Sitemap Generator Crawls your site and generates a valid `sitemap.xml`. Options: * Max depth (default: 3 levels) * Exclude patterns (e.g. `/admin/**`, `/api/**`) * Include `lastmod` dates * Include `changefreq` and `priority` hints Download the generated XML and place it at `/public/sitemap.xml`, then reference it in `/public/robots.txt`: ```txt theme={null} User-agent: * Allow: / Sitemap: https://yourapp.com/sitemap.xml ``` *** ## Robots.txt Checker Validates your `robots.txt` file: * Accessible at `yourdomain.com/robots.txt` * Valid syntax (no malformed directives) * Not accidentally blocking crawlers (common with vibe-coded apps that generate `Disallow: /`) * Sitemap URL is present and accessible *** ## Broken Link Checker Crawls your site and returns a list of: * Internal 404s (pages that don't exist) * Broken external links * Redirect chains longer than 2 hops * Anchors pointing to non-existent headings *** ## Redirect Checker Trace the full redirect chain for any URL: ``` https://yourapp.com/old-page → 301 → https://yourapp.com/new-page ✓ https://www.yourapp.com → 301 → https://yourapp.com ✓ → 301 → https://yourapp.com/home ← Extra hop (fix this) ``` Identifies redirect loops and unnecessary chains that slow down crawlers and real users.