About the SEO Analyzer & Webpage Auditor
On-page SEO auditing is the foundational practice of checking whether a webpage's HTML structure, metadata, headings, and assets follow search engine best practices. Even high-quality content can struggle to rank if basic technical signals — like missing title tags, conflicting canonical tags, or improper robots directives — prevent search crawlers from understanding the page.
This SEO Analyzer audits pasted HTML source code or page snippets entirely inside your browser. It evaluates core on-page ranking factors: title tag length and presence, meta description completeness, heading hierarchy (ensuring a single, focused H1 tag), canonical link integrity, mobile viewport responsiveness, social Open Graph tags, and image alt text coverage.
To use the tool, paste your webpage's HTML source code or head/body markup into the input field. The analyzer immediately computes an overall SEO Health Score (0-100) and displays a pass/fail checklist highlighting specific technical issues alongside actionable recommendations.
A common mistake site owners make is having multiple H1 tags or skipping heading levels (such as jumping directly from H2 to H4), which creates an inconsistent semantic hierarchy for screen readers and search bots. Another frequent error is publishing pages with empty or generic alt tags on key images, missing a prime opportunity to rank in image search and failing web accessibility standards.
Tip: Run your HTML templates through this analyzer during staging or pre-launch checks to ensure no regressions in metadata, canonical URLs, or mobile viewport settings reach production.