On-Page SEO Sidebar

Analyze on-page SEO metadata and structured data locally in Chrome's side panel.

On-Page SEO Sidebar is a Chrome extension for technical on-page SEO checks. It opens in Chrome's side panel and analyzes the active tab's rendered DOM locally in your browser. The extension is useful when you want to inspect structured data, metadata and page signals during development, before publishing, or after a website change. ## What it Checks The sidebar extracts the page title, meta description, canonical URL and hreflang links. It also reads structured data from JSON-LD, Microdata and RDFa. Structured data is shown as a normalized schema tree. Where identifiers are available, related entities are linked so you can see how the page describes products, articles, organizations, breadcrumbs and other schema entities. Development and testing currently focus on modern JSON-LD metadata, because Google recommends JSON-LD for structured data where possible. The findings view highlights malformed JSON-LD, duplicate or conflicting entities and fields that may affect Google rich result eligibility. The bundled Google rich result rules are a local QA layer and do not replace Google's own testing tools. ## Privacy Analysis runs locally in Chrome against the active tab. Page content, URLs, structured data, findings and analysis results are not sent to external services and are not stored after the side panel or page session ends. ## Open Source The extension is Open Source. The source code is available on GitHub: https://github.com/marcobeierer/chrome-on-page-seo-sidebar