# Meta, Open Graph & JSON-LD inspector > Paste a page, or just its head, and read everything it declares the way each standard reads it: the title and the character encoding by the HTML Standard, every meta element classified (the standard's own names, the WHATWG MetaExtensions registry, the pragma directives, the non-conforming ones), every link element with its rel tokens (canonical per RFC 6596, hreflang alternates, icons, manifest), the Open Graph object with its arrays and structured properties per ogp.me, the twitter:* card properties as registered, the robots and googlebot rules by Google's published list, the viewport, and every JSON-LD block parsed and outlined per JSON-LD 1.1. Forty-six findings, each quoting the sentence it rests on. Parsed inertly with parse5; nothing is fetched or executed. - Tool: https://ronutz.com/en/tools/meta-og-jsonld-inspector - Family: Web & HTTP --- ## What it does Takes a page, or just the contents of its head, and reads what it declares the way each standard reads it. The HTML is parsed inertly with parse5 (the parser behind the HTML structure explainer and the CSS selector tester), so a head pasted without `html` or `head` tags is placed where the parser puts it, exactly as a browser would. Nothing is fetched, resolved, executed or rendered: URLs stay strings, scripts stay text, JSON is parsed with `JSON.parse` and never evaluated. The hosted API runs the same code. ## What it reads, and against what - **title and encoding** (HTML Living Standard 4.2.2, 4.2.5.4): one title with text; a character encoding declaration, `utf-8`, once, with the element ending within the first 1024 bytes (the byte offset is shown). - **Every meta element** (4.2.5): classified by how it identifies itself, name, http-equiv, charset, itemprop, or RDFa's property (the Open Graph form, conforming through HTML+RDFa 1.1), and by what the key is: one of the eight standard metadata names (4.2.5.1), a name registered in the WHATWG MetaExtensions wiki (viewport, robots, the verification names, twitter:* and others), a pragma directive (4.2.5.3: content-type, default-style, refresh, x-ua-compatible, content-security-policy) or one the standard calls non-conforming (content-language, set-cookie), or unknown. Each known name carries the standard's or the registry's own sentence. The once-only rules (description, color-scheme, application-name per language) are checked, and a meta element with none of the identifying attributes or without `content` is an error. - **Every link element** (4.6.7): the rel tokens with the ones the standard defines marked; `rel=canonical` per RFC 6596 (relative, several); `rel=alternate` with `hreflang` listed, with whether an `x-default` is among them; icons, apple-touch-icon, mask-icon and manifest. - **Open Graph** (ogp.me): the four required properties (og:title, og:type, og:image, og:url), the optional ones, arrays (the first value is preferred, as ogp.me says), the structured properties of og:image, og:video and og:audio attached to the root before them, and a structured property with no root before it reported as such; og:locale's language_TERRITORY form; og:type against the global types; the vertical namespaces (article, book, profile, music, video, payment) and any property ogp.me does not list. Open Graph written with `name=` instead of `property=` is read too, with a note. - **twitter:\*** card properties as registered in MetaExtensions: twitter:card with the four types the registry names (summary, photo, app, player; `summary_large_image` is reported as in common use, since X's own card documentation is no longer published), and every name checked against the registry. - **robots, googlebot and the other crawler names** against Google's published rule list: current rules with their values (max-snippet, max-image-preview, max-video-preview, unavailable_after), retired rules (noarchive, nocache, nositelinkssearchbox), unknown ones, and conflicts within what one crawler receives ("the more restrictive rule applies"). - **viewport**, parsed into its parts, with a warning when `user-scalable=no` or a `maximum-scale` below 2 keeps users from the 200 percent of WCAG 2.2 SC 1.4.4; **refresh**, parsed into seconds and URL; a **Content Security Policy** in a meta element, handed to the CSP evaluator, and flagged when the meta element is not a child of head (the standard then ignores it). - **JSON-LD** (JSON-LD 1.1 section 7): every `script type="application/ld+json"` parsed; the @context, whether the top level is a @graph, an outline of the nodes with @type, @id and a name-like property, nodes without @type counted; invalid JSON reported with the parser's message; the sequences section 7.2 says to escape (`