SEO Inspector

Free on-page SEO inspector for titles, headings, links, images, schema, indexability and more.

SEO Inspector checks the SEO of any web page in one click, right in your browser. Open it on a page to see what search engines and social platforms can read from it, which issues need attention, and why. It is built for SEO specialists, marketers, developers and site owners who want fast, clear answers without an account or a subscription. WHAT YOU CAN CHECK - Overview: a checklist score out of 100 with critical issues, warnings and passed checks, broken down into On-Page, Technical, Content, Links, Images, Schema and Social. Every check shows its points and a plain-language reason. - Title and meta description: lengths against adjustable guidelines, approximate pixel width, and duplicate tags. - Headings: H1–H6 counts and an outline tree. Flags a missing H1, multiple H1s, empty headings and skipped levels (for example H2 to H4). - Links: internal, external, nofollow, sponsored and UGC links, empty anchor text and links without an href. Filter, search and export to CSV. - Images: missing, empty and suspicious alt text (such as "image" or "IMG_1234"), width and height, lazy loading and srcset. - Indexability: canonical tags, robots meta directives, HTTPS, HTTP status and hreflang validation. An optional check reads HTTP headers such as X-Robots-Tag. - Structured data: JSON-LD, Microdata and RDFa types, JSON syntax errors with line numbers, and one-click Copy JSON-LD. Structured data is reported as detected, not validated. - Open Graph and Twitter/X tags: missing properties and link previews. - Search result preview: an editable desktop and mobile preview of the page's title, URL and description. - Content: visible word, sentence and paragraph counts, reading time and term frequency. Hidden text is excluded. HIGHLIGHT MODE Outline headings, images, image issues and link types directly on the page. The highlights are a temporary overlay; the page itself is never changed, and one click clears them. TOOLS - robots.txt viewer with a path tester - Sitemap and sitemap index inspector, including gzipped sitemaps - Raw HTML vs rendered page comparison, to spot changes made by JavaScript - Page timing measured in your browser (TTFB, FCP, LCP, CLS) - Optional Google PageSpeed Insights results, using your own free API key EXPORT Download the audit as an HTML report, a CSV or JSON. ABOUT THE SCORE The SEO Inspector score is a technical checklist score. It is not a Google ranking score, and it does not predict rankings or traffic. It only counts checks the extension can actually verify on the page, and you can change the category weights in Settings. PRIVACY - No account, no subscription, no ads, no tracking. - Analysis runs locally in your browser. Page content is never sent to any server. - SEO Inspector reads a page only when you open it on that page. - Features that make a network request (robots.txt, sitemaps, the header check and PageSpeed Insights) run only when you click them. - Minimal permissions. Access to all sites is optional and only needed if you want the side panel to follow you across pages. EXTRA FEATURES - Use it as a popup or in Chrome's side panel. - Works with single-page apps and