Free SEO Optimization Checker & Social Meta Analyzer

An SEO optimization checker (or website SEO analyzer) is an automated diagnostic tool that scans a webpage's HTML source code, document structure, meta tags, Open Graph protocols, and technical assets. Our tool performs over 440 distinct checks across 7 core pillars—calculating a weighted website SEO score out of 100 with exact code locations and drop-in fixes.

Simply paste your webpage URL into the input field at the top of the page and click 'Audit & Preview'. The analyzer immediately retrieves the page metadata, validates title length, checks meta description quality, measures keyword density, inspects heading hierarchy (H1-H6), tests social cards, and generates an instant diagnostic report.

The Open Graph protocol was introduced by Facebook to allow any webpage to become a rich object in a social graph. By including `<meta property="og:title">`, `<meta property="og:description">`, and `<meta property="og:image">` tags in your HTML `<head>`, you control the exact preview card displayed when your link is shared on Facebook, LinkedIn, Discord, Slack, and WhatsApp, boosting click-through rates by up to 40%.

The industry standard recommendation for social preview images is 1200 × 630 pixels, which conforms to an aspect ratio of approximately 1.91:1. This ensures full-width, crisp rendering across retina smartphone screens and high-resolution desktop feeds without unwanted auto-cropping.

Keyword density analysis calculates the percentage frequency of target terms across your webpage. Maintaining a natural keyword density between 1% and 2.5% helps search engines understand topical relevance without triggering over-optimization or keyword stuffing penalties.

The `summary` card displays a small square thumbnail (1:1 aspect ratio) positioned to the left of your title and description. The `summary_large_image` card renders a prominent, full-width 2:1 landscape banner above the headline. For marketing sites, SaaS products, and blog posts, `summary_large_image` generates significantly higher click-through rates.

Social media platforms cache metadata aggressively when a URL is shared for the first time. If you update your webpage's meta tags, the platform will continue serving the old cached preview until their cache expires or you manually force a purge using official tools like the Facebook Sharing Debugger or LinkedIn Post Inspector.

No. Social Meta & OG Previewer is designed with a strict zero-cloud-tracking privacy architecture. All simulated analyses, test histories, and favorite links are stored exclusively inside your browser's local storage. No data is stored on remote servers or sold to third parties.