Metadata catalog

The document title used by browsers, bookmarks, search results, and link previews.

<title>My Page</title>

Declares the document character encoding.

<meta charset="utf-8">

Declares the primary language of the document.

<html lang="en">

Declares the base text direction.

<html lang="ar" dir="rtl">

Changes resolution of relative URLs in the document.

<base href="https://example.com/">

Controls viewport behavior on mobile browsers. Common browser convention rather than a core WHATWG metadata-name extension.

<meta name="viewport" content="width=device-width, initial-scale=1">

Page description used by search engines and other consumers.

<meta name="description" content="Inspect website metadata with Tagviu.">

Identifies the page author.

<meta name="author" content="Jane Doe">

Declares the name of a web application.

<meta name="application-name" content="Tagviu">

Identifies software that generated the document.

<meta name="generator" content="Next.js">

Legacy keyword metadata. Detect it, but do not treat it as a positive Google SEO signal.

<meta name="keywords" content="metadata, SEO, Open Graph">

Controls the Referer information sent with requests initiated by the document.

<meta name="referrer" content="strict-origin-when-cross-origin">

Provides a preferred UI/theme color to supporting browsers and contexts.

<meta name="theme-color" content="#111827">

Declares supported color schemes for browser UI and rendering behavior.

<meta name="color-scheme" content="light dark">

Provides crawler/indexing directives.

<meta name="robots" content="index,follow">

Googlebot-specific crawler directives.

<meta name="googlebot" content="index,follow,max-image-preview:large">

Google-specific page behavior metadata.

<meta name="google" content="notranslate">

Google Search Console verification token. Mask the token in public reports.

<meta name="google-site-verification" content="VERIFICATION_TOKEN">

Content rating metadata recognized by Google for SafeSearch-related purposes.

<meta name="rating" content="adult">

Google-specific control related to read-aloud behavior.

<meta name="google" content="nopagereadaloud">

Title used by Open Graph consumers.

<meta property="og:title" content="Tagviu — Web Metadata Inspector">

Declares the Open Graph object type.

<meta property="og:type" content="website">

Primary Open Graph image.

<meta property="og:image" content="https://example.com/og.png">

Canonical Open Graph object URL.

<meta property="og:url" content="https://example.com/page">

Description shown by Open Graph consumers.

<meta property="og:description" content="Inspect metadata and previews.">

Site-level name associated with the object.

<meta property="og:site_name" content="Tagviu">

Primary locale of the object.

<meta property="og:locale" content="en_US">

Alternate locales supported by the object.

<meta property="og:locale:alternate" content="fr_FR">

Determiner used when presenting the object name.

<meta property="og:determiner" content="the">

URL alias for an Open Graph image.

<meta property="og:image:url" content="https://example.com/og.png">

HTTPS version of the image URL.

<meta property="og:image:secure_url" content="https://example.com/og.png">

MIME type of the Open Graph image.

<meta property="og:image:type" content="image/png">

Pixel width of the Open Graph image.

<meta property="og:image:width" content="1200">

Pixel height of the Open Graph image.

<meta property="og:image:height" content="630">

Alternative text for the Open Graph image.

<meta property="og:image:alt" content="Tagviu dashboard">

Open Graph video URL.

<meta property="og:video" content="https://example.com/video.mp4">

Video URL alias.

<meta property="og:video:url" content="https://example.com/video.mp4">

HTTPS video URL.

<meta property="og:video:secure_url" content="https://example.com/video.mp4">

Video MIME type.

<meta property="og:video:type" content="video/mp4">

Video width.

<meta property="og:video:width" content="1280">

Video height.

<meta property="og:video:height" content="720">

Open Graph audio URL.

<meta property="og:audio" content="https://example.com/audio.mp3">

Audio URL alias.

<meta property="og:audio:url" content="https://example.com/audio.mp3">

HTTPS audio URL.

<meta property="og:audio:secure_url" content="https://example.com/audio.mp3">

Audio MIME type.

<meta property="og:audio:type" content="audio/mpeg">

Article section/category.

<meta property="article:section" content="Engineering">

Article publication timestamp.

<meta property="article:published_time" content="2026-09-30T12:00:00Z">

Article modification timestamp.

<meta property="article:modified_time" content="2026-09-30T14:00:00Z">

Article expiration timestamp.

<meta property="article:expiration_time" content="2027-01-01T00:00:00Z">

Article author reference.

<meta property="article:author" content="https://example.com/authors/jane">

Article topic/tag.

<meta property="article:tag" content="Web Development">

First name for a profile object.

<meta property="profile:first_name" content="Jane">

Last name for a profile object.

<meta property="profile:last_name" content="Doe">

Username for a profile object.

<meta property="profile:username" content="janedoe">

Gender property for a profile object.

<meta property="profile:gender" content="female">

Declares the X/Twitter card presentation type.

<meta name="twitter:card" content="summary_large_image">

X/Twitter card title.

<meta name="twitter:title" content="Tagviu">

X/Twitter card description.

<meta name="twitter:description" content="Inspect web metadata.">

X/Twitter card image.

<meta name="twitter:image" content="https://example.com/card.png">

Alternative text for the X/Twitter card image.

<meta name="twitter:image:alt" content="Tagviu preview">

Associated X/Twitter account.

<meta name="twitter:site" content="@tagviu">

Content creator's X/Twitter account.

<meta name="twitter:creator" content="@author">

Player URL used by player cards.

<meta name="twitter:player" content="https://example.com/player">

Player width.

<meta name="twitter:player:width" content="1280">

Player height.

<meta name="twitter:player:height" content="720">

Declares the preferred URL for the page.

<link rel="canonical" href="https://example.com/page">

Declares alternate representations or language versions.

<link rel="alternate" href="/fr/page" hreflang="fr">

Associates a page with a localized language/region variant.

<link rel="alternate" hreflang="fr" href="https://example.com/fr/page">

Declares a site icon/favicon.

<link rel="icon" href="/favicon.svg" type="image/svg+xml">

Apple home-screen icon.

<link rel="apple-touch-icon" href="/apple-touch-icon.png">

Links the Web App Manifest.

<link rel="manifest" href="/manifest.webmanifest">

Links to author information.

<link rel="author" href="/about">

Links to licensing information.

<link rel="license" href="https://creativecommons.org/licenses/by/4.0/">

Links to help/documentation.

<link rel="help" href="/docs">

Hints that a connection to an origin will be needed.

<link rel="preconnect" href="https://cdn.example.com">

Hints that DNS resolution will be needed.

<link rel="dns-prefetch" href="//cdn.example.com">

Requests early loading of a resource.

<link rel="preload" href="/font.woff2" as="font" crossorigin>

Preloads a JavaScript module.

<link rel="modulepreload" href="/app.js">

Hints that a resource may be needed later.

<link rel="prefetch" href="/next-page.html">

Declares an RSS feed.

<link rel="alternate" type="application/rss+xml" href="/feed.xml" title="RSS">

Declares an Atom feed.

<link rel="alternate" type="application/atom+xml" href="/atom.xml">

Entry point to the Web App Manifest.

<link rel="manifest" href="/manifest.webmanifest">

Full application name.

{"name":"Tagviu"}

Short application name.

{"short_name":"Tagviu"}

Application description.

{"description":"Web metadata inspector"}

URL opened when the web app starts.

{"start_url":"/"}

Navigation scope of the installed web app.

{"scope":"/"}

Preferred display mode.

{"display":"standalone"}

Preferred screen orientation.

{"orientation":"portrait"}

Theme color for supported PWA contexts.

{"theme_color":"#111827"}

Background color used by supported PWA contexts.

{"background_color":"#ffffff"}

Application icons and their dimensions/formats.

{"icons":[{"src":"/icon-512.png","sizes":"512x512","type":"image/png"}]}

Controls standalone-style behavior for supported iOS web apps.

<meta name="apple-mobile-web-app-capable" content="yes">

Controls supported iOS standalone web-app status-bar styling.

<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent">

Name used for supported iOS home-screen web apps.

<meta name="apple-mobile-web-app-title" content="Tagviu">

Controls automatic data detection behavior in supported Safari contexts.

<meta name="format-detection" content="telephone=no">

Machine-readable structured data embedded as JSON-LD.

<script type="application/ld+json">{"@context":"https://schema.org","@type":"Article","headline":"Hello"}</script>

Structured data embedded using HTML microdata attributes.

<article itemscope itemtype="https://schema.org/Article"><h1 itemprop="headline">Hello</h1></article>

Structured data embedded using RDFa attributes.

<div vocab="https://schema.org/" typeof="Article"><span property="headline">Hello</span></div>

Describes a website.

{"@context":"https://schema.org","@type":"WebSite","name":"Tagviu","url":"https://tagviu.example"}

Describes a web page.

{"@context":"https://schema.org","@type":"WebPage","name":"Docs"}

Describes an article.

{"@type":"Article","headline":"Metadata Guide","datePublished":"2026-09-30"}

Describes a news article.

{"@type":"NewsArticle","headline":"News"}

Describes a blog post.

{"@type":"BlogPosting","headline":"Engineering Notes"}

Describes breadcrumb navigation.

{"@type":"BreadcrumbList","itemListElement":[]}

Describes an organization.

{"@type":"Organization","name":"Tagviu","url":"https://tagviu.example"}

Describes a person.

{"@type":"Person","name":"Jane Doe"}

Describes a product.

{"@type":"Product","name":"Example Product"}

Describes a review.

{"@type":"Review","reviewBody":"Great product"}

Describes aggregate ratings.

{"@type":"AggregateRating","ratingValue":"4.5"}

Describes an event.

{"@type":"Event","name":"Launch","startDate":"2026-10-01T18:00:00Z"}

Describes a recipe.

{"@type":"Recipe","name":"Pasta"}

Describes a video.

{"@type":"VideoObject","name":"Demo","thumbnailUrl":"https://example.com/thumb.jpg"}

Describes an image.

{"@type":"ImageObject","contentUrl":"https://example.com/image.jpg"}

Describes software.

{"@type":"SoftwareApplication","name":"Tagviu","applicationCategory":"DeveloperApplication"}

Describes a local business.

{"@type":"LocalBusiness","name":"Example Cafe"}

Describes an FAQ page.

{"@type":"FAQPage","mainEntity":[]}

Describes instructions.

{"@type":"HowTo","name":"How to deploy"}

Describes a job posting.

{"@type":"JobPosting","title":"Software Engineer"}

Describes a course.

{"@type":"Course","name":"Go Fundamentals"}

Describes a profile page.

{"@type":"ProfilePage","mainEntity":{}}

Declares the response media type and optional character encoding.

Content-Type: text/html; charset=utf-8

Declares response content encoding.

Content-Encoding: br

Controls HTTP caching behavior.

Cache-Control: public, max-age=3600

Provides a validator for a specific representation.

ETag: "abc123"

Indicates when the representation was last modified.

Last-Modified: Wed, 30 Sep 2026 12:00:00 GMT

Declares the language of the representation.

Content-Language: en

Controls which resources and behaviors are allowed by the browser.

Content-Security-Policy: default-src 'self'

Controls Referer information sent by the browser.

Referrer-Policy: strict-origin-when-cross-origin

Controls MIME-type sniffing behavior.

X-Content-Type-Options: nosniff

Enforces HTTPS behavior for supporting browsers.

Strict-Transport-Security: max-age=31536000; includeSubDomains

Controls access to browser capabilities.

Permissions-Policy: geolocation=(), camera=()

Cross-origin isolation and resource-sharing controls; inspect individual Cross-Origin-Opener-Policy, Cross-Origin-Resource-Policy, and related headers.

Cross-Origin-Opener-Policy: same-origin