The SEO analyzer audits your web page across 7 on-page SEO dimensions — title tag, meta description, heading structure, content quality, image optimization, link quality, and technical factors — returning a 0-100 overall score with pass/warn/fail for each dimension and specific improvement recommendations.
In your browser: right-click → View Page Source (Ctrl+U / Cmd+U), then paste the full HTML below.
How we score — SEO methodology
Title Tag (15%) — Ideal length 50-60 chars scores 100, short/long penalized. Contains keyword hint scores bonus.
Meta Description (15%) — Ideal length 120-160 chars. Contains CTA words ("free", "how", "get") scores higher.
Heading Structure (15%) — Exactly one H1 = 100. Multiple H1s penalized. H2s present = bonus. Logical hierarchy rewarded.
Content Quality (20%) — Word count 300+ is baseline; 600+ scores better; 1200+ is excellent.
Image Optimization (15%) — All images with alt text = 100. Each missing alt = -15 points.
Link Quality (10%) — At least 2 internal links (100), at least 1 external link (bonus). No links = 20.
Technical (10%) — Canonical URL present = 50 bonus, structured data (JSON-LD/schema) = 30 bonus, meta robots defined = 20 bonus.
SEO Score
Score Breakdown
Dimension Results
Recommendations
How to Use the SEO Analyzer
On-page SEO is the foundation of organic search performance. Before building backlinks or creating more content, your existing pages need to be technically sound. The SEO analyzer gives you an instant audit of the factors Google evaluates when deciding where to rank your page.
Step 1: Get your page's HTML source
Open your target page in a browser, right-click anywhere on the page, and select "View Page Source" (or press Ctrl+U on Windows/Linux, Cmd+U on Mac). You'll see the raw HTML in a new tab. Select all (Ctrl+A), copy, and paste into the analyzer's HTML textarea. The tool parses the source to extract title, meta tags, headings, word count, images, links, and structured data automatically.
Step 2: Review each dimension
The analyzer scores 7 dimensions. Green badges (PASS) mean the factor is well-optimized. Amber badges (WARN) indicate sub-optimal values that should be improved. Red badges (FAIL) point to critical gaps that are likely hurting your rankings. Focus on FAIL items first — they have the biggest impact per unit of effort.
Step 3: Prioritize your fixes
Title tag and meta description issues are the fastest wins: they directly affect click-through rate from search results, take minutes to fix, and have immediate impact. Missing alt text on images is the second easiest fix. Heading structure (a single H1, logical H2s) signals page organization to crawlers. Content quality (word count above 600) and link quality take more effort but anchor long-term authority.
Step 4: Re-analyze after making changes
After implementing fixes, re-run the seo-analyzer on the updated page. Aim for a score of 80+ before considering the on-page optimization complete. Common pitfalls: multiple H1 tags (each section header accidentally marked as H1), meta descriptions over 160 characters (truncated in search results), and images from a CMS that strip alt text during upload.
FAQ
What does the SEO analyzer check?
The analyzer evaluates 7 on-page SEO dimensions: title tag (length and keyword presence), meta description (length and CTAs), heading structure (H1/H2/H3 hierarchy), content quality (word count and keyword density), image optimization (alt text presence), link quality (internal and external links), and technical factors (canonical URL, structured data hints).
How do I use the HTML paste mode?
In your browser, right-click the page and select 'View Page Source' or press Ctrl+U (Cmd+U on Mac). Copy the entire HTML and paste it into the textarea. The tool will auto-extract all SEO signals. Alternatively, use manual entry mode to enter each field separately.
Is this tool free?
Yes, completely free with no account required. Your HTML or entered data is processed locally in your browser and never sent to any server.
Is my data safe?
Yes. All analysis happens entirely in your browser using JavaScript — no data is transmitted to any server. Your page source code never leaves your device.
What is a good SEO score?
Scores 80-100 are excellent, 50-79 need moderate improvement, and below 50 indicate significant SEO gaps. Focus first on title tag, meta description, and a single H1 — these have the highest impact on search rankings and click-through rates.
What keyword density is ideal for SEO?
Keyword density of 1-3% is generally considered optimal. Below 0.5% may indicate under-optimization, while above 4-5% risks being flagged as keyword stuffing. However, natural writing that satisfies user intent matters more than hitting a precise percentage.