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SEO Score Checker & Page Auditor

Paste your webpage's raw HTML source code to analyze SEO compliance, identify error attributes, and view instant optimization guides.

Use Tool Below ↓
Paste Raw HTML Source Code
0%
Needs Improvement

Your page structure has multiple critical SEO errors. Review the expanded issues below to fix meta configurations.

0 Errors 0 Warnings 0 Passed

How to Perform a Webpage SEO Audit

🖥️
1. Copy Source Code
Go to your page, open Source View (Ctrl+U or Right Click -> View Page Source), and select and copy everything (Ctrl+A, Ctrl+C).
📝
2. Paste and Audit
Paste the HTML code into our text editor box above and click the "Audit SEO Score" button.
🚀
3. Fix Recommendations
Inspect failures and warnings. Follow the generated guide details to boost search rankings.

Complete SEO Auditing Criteria

🔍 Tags Compliance
Checks title tags length, meta description availability, and absolute canonical tags definitions.
📱 Mobile Layout viewport
Ensures proper responsive viewport parameters are configured for flawless mobile render ranking.
🏷️ Media & Accessibility
Scans image tags for missing alt descriptions attributes to maintain accessibility standards.

Frequently Asked Questions

Why paste HTML instead of crawling a URL? +
Browser security constraints (CORS) block direct requests to foreign domains from clients. Direct code pasting allows deep, instantaneous parsing without backend proxy servers.
Does this tool check Open Graph attributes? +
Yes. It validates Facebook (og:title, og:description, og:image) and Twitter card configuration targets to optimize social share previews.
What is the ideal title tag length? +
For optimum SERP snippets display on search engines, titles should stay between 30 and 60 characters. Descriptions should be between 120 and 160 characters.

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`; document.getElementById('btn-sample').addEventListener('click', () => { document.getElementById('html-input').value = sampleHtml; }); document.getElementById('btn-clear').addEventListener('click', () => { document.getElementById('html-input').value = ''; document.getElementById('dashboard-panel').style.display = 'none'; }); // Active Tab tracking let currentTab = 'all'; let auditResults = []; // Analyze Engine Mechanics document.getElementById('btn-analyze').addEventListener('click', async () => { const rawHtml = document.getElementById('html-input').value.trim(); if (!rawHtml) { alert("Please paste your HTML source code to proceed."); return; } // DOM Parser Compilation const parser = new DOMParser(); const doc = parser.parseFromString(rawHtml, "text/html"); auditResults = []; // 1. Title Audit const titleNode = doc.querySelector('title'); if (!titleNode) { auditResults.push({ type: 'error', title: 'Missing Page Title Tag', body: 'The tag is completely missing from the HTML document.', recommendation: 'Add a <title>Your Title element in the block with a length between 30 and 60 characters.' }); } else { const titleLen = titleNode.textContent.trim().length; if (titleLen < 30 || titleLen > 60) { auditResults.push({ type: 'warning', title: `Title Length Sub-optimal (${titleLen} characters)`, body: `Your page title is ${titleLen} characters. Search engines typically truncate values longer than 60 or ignore short values under 30.`, recommendation: 'Modify your title length to stay within 30 to 60 characters (e.g. current target is ' + titleNode.textContent.trim() + ').' }); } else { auditResults.push({ type: 'pass', title: 'Optimal Title Tag Length', body: `Passed: The title length is ideal (${titleLen} characters): "${titleNode.textContent.trim()}".` }); } } // 2. Meta Description Audit const descNode = doc.querySelector('meta[name="description"]'); if (!descNode) { auditResults.push({ type: 'error', title: 'Missing Meta Description Tag', body: 'The description metadata parameter is missing from the document header.', recommendation: 'Add inside describing your page content within 120-160 characters.' }); } else { const descContent = descNode.getAttribute('content') || ''; const descLen = descContent.trim().length; if (descLen < 120 || descLen > 160) { auditResults.push({ type: 'warning', title: `Sub-optimal Meta Description Length (${descLen} characters)`, body: `Your description length is ${descLen} characters. Aim for 120-160 characters to optimize Google snippet previews.`, recommendation: 'Adjust description attributes to contain between 120 and 160 characters.' }); } else { auditResults.push({ type: 'pass', title: 'Optimal Description Tag Length', body: `Passed: Meta description is correctly configured (${descLen} characters).` }); } } // 3. Viewport Audit const viewNode = doc.querySelector('meta[name="viewport"]'); if (!viewNode) { auditResults.push({ type: 'error', title: 'Missing Mobile Viewport Tag', body: 'No responsive viewport layout tag was detected in your document header.', recommendation: 'Add to trigger responsive mobile viewport rendering.' }); } else { auditResults.push({ type: 'pass', title: 'Mobile Viewport Tag Detected', body: 'Passed: Responsive viewports are correctly configured for mobile devices.' }); } // 4. H1 Heading audit const h1s = doc.querySelectorAll('h1'); if (h1s.length === 0) { auditResults.push({ type: 'error', title: 'Missing H1 Primary Heading', body: 'Your document does not contain an

tag.', recommendation: 'Always introduce exactly one

element per page to act as the primary title header for search algorithms.' }); } else if (h1s.length > 1) { auditResults.push({ type: 'warning', title: `Multiple H1 Heading Tags Detected (${h1s.length})`, body: `Found ${h1s.length}

tags. Using multiple primary headings may confuse indexing algorithms mapping primary context.`, recommendation: 'Downgrade secondary

tags to

or

elements, keeping only one

at the top.' }); } else { auditResults.push({ type: 'pass', title: 'Single H1 Heading Configured', body: `Passed: Exact single

tag parsed successfully: "${h1s[0].textContent.trim()}".` }); } // 5. Canonical Url Audit const canonNode = doc.querySelector('link[rel="canonical"]'); if (!canonNode) { auditResults.push({ type: 'warning', title: 'Missing Canonical URL Link', body: 'No canonical URL link (rel="canonical") tag was detected.', recommendation: 'Add in your head to avoid duplicate content penalties.' }); } else { auditResults.push({ type: 'pass', title: 'Canonical URL Defined', body: `Passed: The canonical URL link is correctly defined: "${canonNode.getAttribute('href')}".` }); } // 6. Image alt attribute audit const imgs = doc.querySelectorAll('img'); if (imgs.length > 0) { let missingAlt = 0; imgs.forEach(i => { if (!i.hasAttribute('alt') || i.getAttribute('alt').trim() === '') { missingAlt++; } }); if (missingAlt > 0) { auditResults.push({ type: 'warning', title: `Missing Alt Text on Images (${missingAlt}/${imgs.length})`, body: `You have ${missingAlt} out of ${imgs.length} images missing "alt" text attributes. This degrades accessibility scores.`, recommendation: 'Loop through your image elements and append descriptive alt attributes (e.g. Description of image).' }); } else { auditResults.push({ type: 'pass', title: 'All Images Contain Alt Text', body: `Passed: All ${imgs.length} image tags have valid descriptive alt text definitions.` }); } } // 7. Open Graph metadata audit const ogTitle = doc.querySelector('meta[property="og:title"]'); const ogDesc = doc.querySelector('meta[property="og:description"]'); if (!ogTitle || !ogDesc) { auditResults.push({ type: 'warning', title: 'Incomplete Open Graph Metadata', body: 'Social share properties (og:title, og:description) are partially or fully missing.', recommendation: 'Include basic Open Graph header meta tags to generate professional cards on platforms like Facebook and LinkedIn.' }); } else { auditResults.push({ type: 'pass', title: 'Open Graph Metadata Complete', body: 'Passed: The page contains valid Facebook social share metadata.' }); } // Calculate score out of 100 based on weight logic let passes = auditResults.filter(r => r.type === 'pass').length; let warnings = auditResults.filter(r => r.type === 'warning').length; let errors = auditResults.filter(r => r.type === 'error').length; let totalChecks = auditResults.length; // Weighted score: error counts -15, warning counts -6 let scoreVal = 100 - (errors * 15) - (warnings * 6); scoreVal = Math.max(0, Math.min(100, scoreVal)); // Display Dashboard document.getElementById('dashboard-panel').style.display = 'flex'; // Update Radial const progressCircle = document.getElementById('score-progress'); const radius = 60; const circumference = 2 * Math.PI * radius; const offset = circumference - (scoreVal / 100) * circumference; progressCircle.style.strokeDashoffset = offset; document.getElementById('score-text').textContent = `${scoreVal}%`; // Status text updates const statusTitle = document.getElementById('score-status-title'); const statusDesc = document.getElementById('score-status-desc'); if (scoreVal >= 90) { statusTitle.textContent = 'Excellent SEO compliance!'; statusDesc.textContent = 'Your page conforms to major search engine guidelines. It is fully ready for high organic search rankings.'; progressCircle.setAttribute('stroke', '#00FF66'); } else if (scoreVal >= 70) { statusTitle.textContent = 'Good structure (Needs tweaks)'; statusDesc.textContent = 'You have minor warnings and attributes configurations missing. Adjust the warning components to maximize organic traffic.'; progressCircle.setAttribute('stroke', '#FF9900'); } else { statusTitle.textContent = 'Critical SEO issues found'; statusDesc.textContent = 'Your page has critical errors like missing titles or headings structures. Use the audit recommendations to fix these constraints immediately.'; progressCircle.setAttribute('stroke', '#FF0066'); } // Counter badges document.getElementById('cnt-errors').textContent = `${errors} Errors`; document.getElementById('cnt-warnings').textContent = `${warnings} Warnings`; document.getElementById('cnt-passed').textContent = `${passes} Passed`; // Render Issues renderIssues(); // Log usage await logToolUsage('SEO Score Checker', 'seo', 'seo-score-checker'); }); function renderIssues() { const listContainer = document.getElementById('audit-list'); listContainer.innerHTML = ''; let filtered = auditResults; if (currentTab === 'errors') filtered = auditResults.filter(r => r.type === 'error'); if (currentTab === 'warnings') filtered = auditResults.filter(r => r.type === 'warning'); if (currentTab === 'passed') filtered = auditResults.filter(r => r.type === 'pass'); if (filtered.length === 0) { listContainer.innerHTML = `
No audits match this filter group.
`; return; } filtered.forEach(item => { const card = document.createElement('div'); card.className = 'audit-item'; let typeBadge = ''; if (item.type === 'error') typeBadge = `Error`; if (item.type === 'warning') typeBadge = `Warning`; if (item.type === 'pass') typeBadge = `Passed`; card.innerHTML = `
${item.title} ${typeBadge}
${item.body}
${item.recommendation ? `
Fix: ${item.recommendation}
` : ''} `; listContainer.appendChild(card); }); // Update tab counts const tabs = document.getElementById('audit-tabs').querySelectorAll('.tab-btn'); tabs[0].textContent = `All Issues (${auditResults.length})`; tabs[1].textContent = `Errors (${auditResults.filter(r => r.type === 'error').length})`; tabs[2].textContent = `Warnings (${auditResults.filter(r => r.type === 'warning').length})`; tabs[3].textContent = `Passed (${auditResults.filter(r => r.type === 'pass').length})`; } // Tabs clicks document.getElementById('audit-tabs').querySelectorAll('.tab-btn').forEach(btn => { btn.addEventListener('click', (e) => { document.getElementById('audit-tabs').querySelectorAll('.tab-btn').forEach(b => b.classList.remove('active')); btn.classList.add('active'); currentTab = btn.getAttribute('data-type'); renderIssues(); }); });