GO SERP: SEO audit, meta tags, schema, links by GOSERP

GO SERP runs an on-page SEO audit of the tab you have open and shows what a search crawler sees: no third party service, no sign up, no account.

Eight tabs:

• Overview: title and description with character counters, canonical, robots (including X-Robots-Tag from the response header), language, charset, viewport, hreflang, text volume, a summary of H1-H6, images and links. Indexing is here too: how many pages of the site a search engine holds, and whether this exact page is in the results.
• Headings: the H1-H6 tree with "hidden" and "skipped level" marks.
• Technologies: CMS, frameworks, analytics, widgets, server and CDN.
• Structured data: every JSON-LD and Microdata entity with its properties; broken JSON-LD is flagged separately.
• Images: counters (no alt, empty alt, lazy loading, served twice larger than displayed), export of every raster image to ZIP, export of all vector graphics to ZIP, and a snapshot of the whole page as one PNG, WebP or PDF file.
• Links: counters and filters by type: internal, external, subdomains, nofollow, no anchor text.
• Social: card preview and the full list of og: and twitter: tags.
• Tools: links to the goserp.ru tools and to external checks.

Outside the popup:

• Heading badges on the page itself: the tag of every H1-H6 is shown next to its last letter.
• Selected text statistics: words, characters with and without spaces. The panel appears at the end of the selection you were dragging and always stays fully on screen.
• Right click menu: search the selected phrase, check a link, open robots.txt and sitemap.xml of the site, reverse image search, PageSpeed, W3C validator.

The extension is free. Nothing is sent anywhere: everything it reads stays in the browser, and settings live in the local storage of the extension.