SEOLens - On-Page SEO Checker

About

Instant on-page SEO audit. 7 categories, 40+ checks — meta tags, headings, schema, links & more. No API key needed.

SEOLens gives you a full on-page SEO audit in seconds — directly in your browser, with no account, no API key, and no data leaving your device.

WHAT IT CHECKS (40+ individual checks across 7 categories):

▸ Meta — Title tag, meta description, canonical URL, robots meta, Open Graph (og:title, og:image, og:description), Twitter Card, viewport

▸ Headings — H1 presence and uniqueness, heading hierarchy, H2 structure

▸ Content — Word count, text-to-HTML ratio, top keyword frequency, language attribute, paragraph count, bold/italic usage

▸ Links — Internal link count, external links, empty anchor text, missing rel="noopener", nofollow/sponsored link detection

▸ Images — Missing alt text, empty decorative alt, width/height attributes, lazy loading, WebP/AVIF format usage

▸ Technical — HTTPS, URL length and cleanliness, DOM size, inline scripts/styles, DOMContentLoaded time, hreflang, AMP link, external script count, structured data presence

▸ Schema — JSON-LD detection, schema type identification, required field validation per type, raw JSON-LD preview

HOW IT WORKS:
Click the extension icon, then click Analyze. SEOLens injects a read-only script into the current page, reads the DOM, scores each category 0–100, and displays everything in a clean tabbed panel. Click "Copy Report" to export a plain-text summary to your clipboard.

PRIVACY:
Zero data collection. Zero network requests. Everything runs locally in your browser. Nothing is sent anywhere — ever.

PERFECT FOR:
SEO professionals, web developers, content writers, and site owners who want quick actionable feedback without leaving the page.