Reveals structured metadata (Microdata, RDFa, JSON-LD, Turtle, etc.) embedded within HTML documents.
The OpenLink Structured Data Sniffer (OSDS) is a browser extension for Google Chrome, Mozilla Firefox, and Opera (with builds planned for Apple Safari, and Microsoft Edge) that unveils metadata oriented structured data embedded within HTML documents. At its core, every search engine optimization (SEO) effort requires agility in managing document metadata. OSDS provides a productive way to check the impact of such document metadata on the results pages of various search engines.
- (2019-05-09) Aaron Bradley: Hands down the best-in-class extension for inspecting a page for the presence or absence of structured or semi-structured data.
- (2018-02-12) Tyson Graaff: Just what I was looking for. Let's me know if my JSON-LD is on the page and I can check it in an easy to read format.
- (2017-04-20) Michael Andrews: Very helpful tool for seeing structured data on a web page.
- (2016-06-21) Rich Missey: Dug around for over an hour trying to find an extension that could display JSON-LD data pulled through an AJAX call. Thought I was going to have to write the thing myself!
- (2015-12-22) I've been enjoying using this extension to see what markup has been used on pages. I've recommended that others install and use this extension as well. It makes understanding what is going on upon pages easier to glean, in a helpful way.
- (2015-12-22) Barbara Starr: I have long been awaiting the arrival of a chrome extension that can effectively detect json-ld and display it in my chrome browser as an alert/extension with the relevant data. This tool detects not only json-ld, but all semantic markup formats/syntaxes (Microdata, rdfa, etc). The UI is elegantly and well thought out in terms of the fact that there are tabs for each syntax. I love this extension and highly recommend it!! As a caveat, it has other interesting features I have not yet fully explored, but that does not detract in any way from my above statements.