Structured Data Testing Tool is a freeDeveloper ToolsExtension for Chrome. You could download thelatest version crx fileand install it. This extension will check structured data / rich snippets on a webpage regardless of whether it is online, on an intranet or behind a passworded page. ...
You are about to download theOpenLink Structured Data Sniffer 3.4.8 Extension crx file for Chrome v88 and up: Reveals structured metadata (Microdata, RDFa, JSON-LD, Turtle, etc.) embedded within HTML documents. ... The offline & original crx file ofOpenLink Structured Data Sniffer v3.4.8was...