OpenLink Structured Data Sniffer

Reveals structured metadata (Microdata, RDFa, JSON-LD, Turtle, etc.) embedded within HTML documents.

OpenLink Structured Data Sniffer: Uncover Hidden Metadata

OpenLink Structured Data Sniffer is a specialized tool designed to enhance your browsing experience by revealing embedded metadata in HTML documents. It exposes structured data islands created using various notations like Microdata, RDFa, JSON-LD, RDF-Turtle, RDF-XML, CSV, and JSON. This tool eases the process of understanding a document's metadata, which can benefit end-users, developers, and digital content managers alike. It visually indicates the presence of metadata and, upon a click, presents transformed metadata in an easy-to-understand format.

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Extension stats

By: OpenLink Software

Users: 7,000+

Rating: 4.76

(17)

Version: 3.4.8 (Last updated: 2024-11-13)

Creation date: 2020-05-30

Risk impact: High risk impact

Risk likelihood:

Very low risk likelihood

Manifest version: 3

Permissions:

storage
webRequest
contextMenus
scripting
declarativeNetRequest

Host permissions:

<all_urls>

Size: 2.67M

Email: su*****@openlinksw.com

URLs: Privacy policy

Ranking

# 12,341 ▲ 80

Other rankings

#1775 in Developer Tools ▲ 2 #15 in data keyword 15 ▲ 2 #175 in content optimization keyword 13 ▼ 2 #241 in json keyword 21 ▲ 1

Other platforms

Not available on Android

OpenLink Structured Data Sniffer (v3.4.8)

4.30

(10) 449

Not available on Edge

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Extension summary

Analyze keywords

What is it? The OpenLink Structured Data Sniffer (OSDS) is an extension for Web Extensions compliant browsers (e.g., Google Chrome, Microsoft Edge, Opera, and many others) that discovers Metadata embedded within HTML documents as Structured Data Islands and presents what's discovered using a Property Sheet presentation style.

Currently, OSDS supports discovery and processing of Structured Data Islands published using notations such as Microdata, RDFa, JSON-LD, RDF-Turtle, RDF-XML, CSV, and JSON.

Why is it important? It simplifies the process of understanding what a given HTML document is about, via its metadata, for both end-users and developers. For instance, it helps Digital Brand Managers, Digital Content Managers, and Semantic Search Engine Optimization (SSEO) practitioners understand what may or may not be affecting Search Engine Results Pages (SERPs) placements.

How is it used?

Simply install the extension to your browser and then visit a page of interest. On page arrival, the OSDS icon will be visually activated thereby indicating metadata discovery; once the icon is clicked, you will be presented with a presentation of transformed metadata.

User reviews

These summaries are automatically generated weekly using AI based on recent user reviews. Chrome Web Store does not verify user reviews, so some user reviews may be inaccurate, spammy, or outdated.

Pros

Great for providing insight into RDF data on websites.
Best-in-class extension for inspecting structured and semi-structured data.
Detects various semantic markup formats (JSON-LD, Microdata, RDFa).
User-friendly UI with tabs for each syntax.
Helpful tool for easy reading and understanding of structured data.

Cons

Contains minor bugs related to prefix URL handling.
Adds extra popup and snackbar items to the DOM.

Most mentioned

Great for inspecting structured data.
Detects JSON-LD effectively.
User-friendly interface.

User reviews

This extension is great at providing insight into the RDF data that is contained in websites. 𝕄𝕚𝕟𝕠𝕣 𝕓𝕦𝕘 𝗧𝗵𝗲 𝗶𝘀𝘀𝘂𝗲: In a turtle file, expanding prefixed node names fails if a prefix URL is missing a "/" after the host part, as in here: "@𝚙𝚛𝚎𝚏𝚒𝚡 𝚜𝚌𝚑𝚎𝚖𝚊: <𝚑𝚝𝚝𝚙𝚜://𝚜𝚌𝚑𝚎𝚖𝚊.𝚘𝚛𝚐>.". So "𝚜𝚌𝚑𝚎𝚖𝚊:𝚌𝚘𝚗𝚝𝚎𝚗𝚝𝚞𝚛𝚕" resolves to "𝚑𝚝𝚝𝚙𝚜://𝚜𝚌𝚑𝚎𝚖𝚊.𝚘𝚛𝚐𝚌𝚘𝚗𝚝𝚎𝚗𝚝𝚞𝚛𝚕/", which is not what we want. 𝗧𝗵𝗲 𝗳𝗶𝘅: Easy, if the path of the prefix URL is empty then act as if the path part were "/". (And: if the RDF-related specs don't mandate this behaviour, then maybe the specs should be fixed as well !)

Doğa Armangil, 2024-02-17

Duy Nguyen, 2023-12-06

Unfortunately this plugin adds popup and snackbar items to the DOM. You can see this by inspecting DOM and seeing super_links_popup items and osds_popup junk get added to your DOM in your browser.

Joshua Hintze, 2023-04-04

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Extension safety

Risk impact

OpenLink Structured Data Sniffer requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.