WebCheck360: On-Page SEO Audit

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Analyze 160+ on-page signals instantly. Meta tags, schema, links, security headers, readability. Free, runs locally, no tracking. After juggling multiple extensions that demanded subscriptions, collected data, or crashed browsers with bloat, I built WebCheck360. One tool that analyzes any website instantly, runs entirely in your browser, and respects your privacy. WHY IT EXISTS - 86KB total size, runs instantly with no API calls - 160+ on-page signals checked in seconds - 100% local processing, your data never leaves your browser - Free forever, no accounts, no premium tiers Social Tags Open Graph validation, Twitter Cards, image dimensions for sharing. Structured Data JSON-LD, Microdata, RDFa detection. Schema checks for Organization, LocalBusiness, Article, Breadcrumbs. International Hreflang tag validation and implementation checks. Readability Flesch Reading Ease, Flesch-Kincaid Grade, Gunning Fog, SMOG, sentence and paragraph metrics. Resources Scripts, stylesheets, images, fonts inventory with third-party tracking detection. FEATURES - Opportunities tab with prioritized recommendations - Tools directory linking to PageSpeed Insights, Search Console, and more - Dark mode CUSTOMISATION Adjust scoring weights for each category. Set thresholds for title length, description length, keyword density, readability scores. Save and reuse configurations. EXPORT CSV for spreadsheets, JSON for developer workflows. WHO IT'S FOR - Freelancers running quick client audits. - Agencies standardising checks across teams. - Developers catching issues before deployment. - In-house teams monitoring site health. FOCUSED ON WHAT YOU CAN CONTROL No vanity metrics. No made-up authority scores. Just on-page factors you can actually see, verify, and fix. GET STARTED Click Add to Chrome. Visit any page. Click the icon. Done.

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