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Free tool to stringify JSON online: escape JSON into string literals or unescape stringified payloads back to JSON. 100% private in-browser.
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SEO Content Checker & SERP Simulator
Free online SEO content checker: audit readability, analyze keyword density, check heading hierarchy, and simulate Google SERP snippets 100% locally in-browser.
Common queries and details about using this utility.
A URL Metadata Extractor is a developer and SEO auditing tool that parses the HTML source code of any webpage to extract essential meta tags, including Open Graph (og:title, og:description, og:image, og:url), Twitter Card properties, core SEO tags (title, meta description, canonical, robots directives), Favicons, and Schema.org JSON-LD structured data.
Open Graph (OG) and Twitter Card tags tell platforms like Facebook, LinkedIn, Discord, Slack, and X how to build rich media preview snippets when users share links. Without proper Open Graph tags, social platforms display a plain text URL or crawl random images from your webpage, resulting in significantly lower click-through rates (CTR).
Yes! Our tool supports both live URL fetching and direct Raw HTML parsing. You can paste any HTML snippet, <head> template, or local staging code to inspect metadata and simulate social previews 100% client-side inside your browser with zero network requests or CORS limitations.
The standard recommended resolution for Open Graph images (og:image) is 1200 × 630 pixels with an aspect ratio of 1.91:1. For square summary cards, 600 × 600 pixels (1:1 aspect ratio) is recommended. The image file format should be PNG, JPEG, or WebP, and kept under 5MB (preferably below 1MB) for fast social feed loading.
Social media networks cache Open Graph preview data for days. To force an immediate refresh after updating your meta tags, use the official debuggers in our Export tab: Facebook Sharing Debugger, X (Twitter) Card Validator, and LinkedIn Post Inspector to invalidate their server-side caches.
Google search desktop and mobile results truncate titles based on container pixel bounds (~600px on desktop, ~680px on mobile) rather than a fixed character count. Wide characters (such as W, M, @) consume nearly 3x the horizontal space of narrow characters (such as i, l, 1, |). Our tool calculates proportional typography widths to accurately predict whether your title will be truncated in search results.
Yes! Our Framework Code Generator in the Export tab automatically converts your extracted or simulated meta tags into modern type-safe Next.js 14+ Metadata objects, React Helmet JSX snippets, Vue / Nuxt 3 useHead composables, SvelteKit <svelte:head> blocks, and Schema.org JSON-LD scripts ready for direct 1-click clipboard copy.
No. All requests are processed on-the-fly with zero logging. We do not store visited URLs, query strings, or extracted metadata payloads on any remote database. Your analysis history is saved strictly within your browser's localStorage.
Press Alt+V (or click the layout toggle button in the Hero Quick Action Toolbar) to toggle between a 2-Column Side-by-Side Split Studio (ideal for comparing raw tags with live social card previews on desktop) and a Full-Width Stacked Layout. Your preference is automatically persisted across sessions in localStorage (telekit_url_metadata_layout_density). Furthermore, press Alt+D or click the Star icon to bookmark this tool in your favorites.
Yes! Press Alt+P (or click the Smart Clipboard toolbar button) to trigger DevToys Smart Clipboard Auto-Detect, which automatically analyzes your clipboard for live URLs, raw HTML markup, or JSON-LD structured data and configures the editor instantly. In the Executive Overview, use the 1-Click Quick Copy Action Strip (Alt+1 through Alt+6) to rapidly copy All HTML tags, Open Graph tags, Twitter Cards, Next.js metadata, Schema.org JSON-LD, or Markdown tables with animated 2-second checkmark timers. You can also click the interactive live target export filename badge pill (📄 Target: <filename> (Click to Copy)) or open the Developer API Studio (Alt+S) to download zero-dependency scraper scripts across 6 programming languages.
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Chained Workflows (Piping)
Send this tool's output directly into another utility without manual copy-paste.
🏷️Developer SEO & Open Graph Suite
Client-Side AST Parser Ready
URL Metadata Extractor — Open Graph & SEO Inspector
Extract, inspect, audit, and preview Open Graph, Twitter Cards, SEO meta tags, Favicons, and Schema.org JSON-LD structured data from any webpage or HTML code. 100% client-side privacy with instant offline parsing fallback.
⚡100% Client-Side Engine
Direct in-browser HTML parsing with zero remote telemetry
🔒Zero Server Retention
URLs, payloads & cookies remain strictly in your local browser
🌐8+ Social Simulators
Google SERP, X (Twitter), Facebook, LinkedIn, Discord, Slack, Pinterest & Telegram
📊Real-Time Health Audit
Instant character bounds, missing tags & JSON-LD diagnostic
Enter any public webpage URL or paste HTML source code above to inspect OpenGraph, Twitter Cards, SEO tags, JSON-LD structured schema, and 8 live social link previews.
Follow these simple steps to inspect, validate, and optimize your website's SEO and social cards.
1
Enter Target URL
Paste any live URL or switch to "Raw HTML" mode to paste template markup directly into the editor.
2
Automatic Parsing
Our parser scans all Open Graph, Twitter Cards, Schema.org JSON-LD, Favicons, and core SEO meta tags.
3
Review Health Score
Inspect character length meters, missing image warnings, duplicate tags, and Google SERP desktop/mobile cards.
4
Export & Debug
Copy clean HTML meta tags, download JSON audit reports, or test directly in official Facebook and X debuggers.
Understanding Webpage Metadata Standards
When search crawlers or social media bots index your webpage, they analyze specific tags inside the HTML <head> element to determine page content and display format. Modern web applications rely on three primary metadata protocols:
1. Core SEO Meta Tags
Includes <title>, <meta name="description">, and <link rel="canonical">. These directly influence your search rankings and SERP snippet click-through rates.
2. Open Graph Protocol
Created by Facebook and adopted universally by LinkedIn, Discord, Slack, and Pinterest. Uses og:title, og:image, and og:description to build interactive rich cards.
3. Schema.org JSON-LD
Machine-readable structured JSON format that helps Google generate Rich Snippets (star ratings, FAQ accordions, breadcrumbs, and article badges) in organic search results.
Metadata Specifications & Limits Matrix
Tag Type
Primary Platform
Ideal Character Length
Key Requirement
Title Tag
Google, Bing, Browser Tabs
50–60 characters
Unique per page, primary keywords first
Meta Description
Google SERP Snippets
120–160 characters
Compelling call-to-action (CTA)
og:image
Facebook, LinkedIn, Discord
1200 × 630 px (1.91:1)
Absolute HTTPS URL under 5MB
twitter:card
X (Formerly Twitter)
summary_large_image
Requires matching twitter:title / image
JSON-LD Schema
Google Rich Snippets
Structured JSON
Valid Schema.org compliant context
Related Developer & Webmaster Utilities
Explore interconnected utilities for crawler validation, schema formatting, and asset optimization.
Everything you need to know about extracting, auditing, and optimizing webpage metadata
What is a URL Metadata Extractor?
A URL Metadata Extractor is a developer and SEO auditing tool that parses the HTML source code of any webpage to extract essential meta tags, including Open Graph (og:title, og:description, og:image, og:url), Twitter Card properties, core SEO tags (title, meta description, canonical, robots directives), Favicons, and Schema.org JSON-LD structured data.
How do Open Graph and Twitter Card tags affect social link shares?
Open Graph (OG) and Twitter Card tags tell platforms like Facebook, LinkedIn, Discord, Slack, and X how to build rich media preview snippets when users share links. Without proper Open Graph tags, social platforms display a plain text URL or crawl random images from your webpage, resulting in significantly lower click-through rates (CTR).
Can I inspect raw HTML code without a publicly accessible URL?
Yes! Our tool supports both live URL fetching and direct Raw HTML parsing. You can paste any HTML snippet, <head> template, or local staging code to inspect metadata and simulate social previews 100% client-side inside your browser with zero network requests or CORS limitations.
What are the recommended dimensions and formats for Open Graph preview images?
The standard recommended resolution for Open Graph images (og:image) is 1200 × 630 pixels with an aspect ratio of 1.91:1. For square summary cards, 600 × 600 pixels (1:1 aspect ratio) is recommended. The image file format should be PNG, JPEG, or WebP, and kept under 5MB (preferably below 1MB) for fast social feed loading.
How do I force Facebook and Twitter to refresh outdated link previews?
Social media networks cache Open Graph preview data for days. To force an immediate refresh after updating your meta tags, use the official debuggers in our Export tab: Facebook Sharing Debugger, X (Twitter) Card Validator, and LinkedIn Post Inspector to invalidate their server-side caches.
How does the tool calculate Google SERP title pixel widths?
Google search desktop and mobile results truncate titles based on container pixel bounds (~600px on desktop, ~680px on mobile) rather than a fixed character count. Wide characters (such as W, M, @) consume nearly 3x the horizontal space of narrow characters (such as i, l, 1, |). Our tool calculates proportional typography widths to accurately predict whether your title will be truncated in search results.
Can I export metadata for Next.js App Router, React Helmet, Nuxt 3, and SvelteKit?
Yes! Our Framework Code Generator in the Export tab automatically converts your extracted or simulated meta tags into modern type-safe Next.js 14+ Metadata objects, React Helmet JSX snippets, Vue / Nuxt 3 useHead composables, SvelteKit <svelte:head> blocks, and Schema.org JSON-LD scripts ready for direct 1-click clipboard copy.
Does Telekit Tools store or log my analyzed website URLs?
No. All requests are processed on-the-fly with zero logging. We do not store visited URLs, query strings, or extracted metadata payloads on any remote database. Your analysis history is saved strictly within your browser's localStorage.
How do I switch between Side-by-Side Split Studio and Stacked View modes, and bookmark this utility?
Press Alt+V (or click the layout toggle button in the Hero Quick Action Toolbar) to toggle between a 2-Column Side-by-Side Split Studio (ideal for comparing raw tags with live social card previews on desktop) and a Full-Width Stacked Layout. Your preference is automatically persisted across sessions in localStorage (telekit_url_metadata_layout_density). Furthermore, press Alt+D or click the Star icon to bookmark this tool in your favorites.
Can I use DevToys Smart Clipboard Auto-Detect, 1-Click Quick Copy formats, and download standalone scraper scripts?
Yes! Press Alt+P (or click the Smart Clipboard toolbar button) to trigger DevToys Smart Clipboard Auto-Detect, which automatically analyzes your clipboard for live URLs, raw HTML markup, or JSON-LD structured data and configures the editor instantly. In the Executive Overview, use the 1-Click Quick Copy Action Strip (Alt+1 through Alt+6) to rapidly copy All HTML tags, Open Graph tags, Twitter Cards, Next.js metadata, Schema.org JSON-LD, or Markdown tables with animated 2-second checkmark timers. You can also click the interactive live target export filename badge pill (📄 Target: <filename> (Click to Copy)) or open the Developer API Studio (Alt+S) to download zero-dependency scraper scripts across 6 programming languages.