Free SEO Optimization Checker & Website Analyzer
Audit any website for search engine optimization. Evaluate on-page SEO, keyword density, heading hierarchy, Open Graph social cards, and technical crawlability with instant, drop-in code fixes.
See exactly how your website looks and ranks.
Explainable SEO health scoring, search intent analysis, heading hierarchy validation, and live cross-platform card simulation.
How Our SEO Optimization Checker Evaluates Your Site
Our automated SEO analyzer scans over 440 distinct criteria across 7 core pillars to compute an accurate, weighted website SEO score out of 100.
1. On-Page SEO & Meta Tags (20 Pts)
Audits title tag length (50-60 chars), meta descriptions (120-160 chars), primary keyword placement, viewport meta tags, and robots directives.
2. Open Graph Protocol (20 Pts)
Validates og:title, og:description, og:image, og:url, and og:site_name for Facebook, LinkedIn, Discord, and Slack.
3. Twitter / X Social Cards (15 Pts)
Verifies twitter:card (summary_large_image vs summary), dedicated card images, creator handles, and fallback behavior.
4. Heading & Document Structure (15 Pts)
Inspects heading hierarchy (<h1> through <h6>), checks for multiple H1 violations, and verifies semantic HTML5 structure.
5. Social Images & Media Assets (10 Pts)
Tests 1200×630 dimensions, 1.91:1 ratio, secure HTTPS hosting, file sizes under 5MB, and cross-platform feed crop safety.
6. Technical SEO, Speed & Schema (20 Pts)
Evaluates HTTP status, server response time, canonical URLs, SSL certificates, JSON-LD Schema structured data, and language declarations.
Comprehensive Guide: How to Conduct a Free Website SEO Audit
Follow this proven step-by-step checklist to diagnose your site, optimize keyword density, and boost organic search traffic.
Step 1: Check Page Titles and Meta Descriptions
The title tag is the primary anchor search engines use to understand page context. Ensure your primary target keyword appears within the first 60 characters. Your meta description should summarize the content in 120–160 characters with a clear call-to-action to maximize organic search CTR.
Step 2: Optimize Keyword Density & Search Intent
Natural keyword usage is vital for topical relevance. Aim for a primary keyword density of 1% to 2.5% across body copy, headings, and image alt text. Avoid unnatural keyword stuffing, and ensure the content answers the user's search intent (Informational, Commercial, Navigational, or Transactional).
Step 3: Audit Heading Hierarchy (H1–H6)
Search crawlers rely on heading tags to navigate document structure. Every page must contain exactly one <h1> heading reflecting the central topic. Use <h2> subheadings for major subsections and <h3> for detailed points without skipping heading levels.
Step 4: Implement Open Graph & Twitter Card Tags
When users share your content on social platforms or messaging apps, missing Open Graph tags result in blank gray boxes or cropped thumbnails. Declaring 1200×630 Open Graph tags increases referral traffic and natural backlink acquisition.
Step 5: Verify Schema Structured Data (JSON-LD)
Structured data helps search engines display rich snippets (star ratings, FAQ accordions, breadcrumbs, and software application badges) in search results. Use JSON-LD schema markup for clean, standardized entity declaration.
Frequently Asked Questions
Everything you need to know about website SEO audits, Open Graph standards, and search engine optimization.
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.
Love using this tool? Leave a Review
Your feedback directly shapes our product roadmap. Share your experience, feature ideas, or a shoutout!
Thank you for your review!
We truly appreciate your feedback. It helps us keep improving the tool for developers and digital creators worldwide.
Zero spam guarantee • Powered by Web3Forms