OpenLink Structured Data Sniffer

Name: OpenLink Structured Data Sniffer
Rating: 4.3636 (11 reviews)
Author: OpenLink Software Inc

Adds structured data discovery and handling of multiple content-types to your browser. Reveals Structured Metadata embedded within HTML pages in notations including POSH (Plain Old Semantic HTML), Microdata, JSON-LD, RDF-Turtle, and RDFa.

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Features & Capabilities

OpenLink Structured Data Sniffer is a powerful browser extension that enhances the discovery and handling of structured metadata embedded within HTML pages and various content types. It supports multiple notations including POSH (Plain Old Semantic HTML), Microdata, JSON-LD, RDF-Turtle, and RDFa. Beyond simple discovery, the extension enables your browser to natively render JSON-LD and RDF-Turtle documents, offering seamless interaction with structured data.

Additional features include a comprehensive Web Service Console that facilitates RESTful interactions and identity toggling over TLS connections without browser restarts. Users can easily export data between formats like RDF-Turtle and JSON-LD via a convenient copy and paste function. Support for CSV and JSON documents enhances data visualization capabilities, while one-click saving of structured data to SPARQL-accessible Knowledge Graphs allows efficient data management. The extension also offers SuperLinks which connect words and phrases directly to entity descriptions across Knowledge Graphs, simplifying data exploration with a single click.

User Growth & Download Statistics

Add-on Developer Tools Data

By:

OpenLink Software Inc

Daily users:

387 -5

Rating:

4.36

(11)

Version:

3.4.27 Last updated: 2025-08-16

Version code:

6013821

Creation date:

2015-12-20

Risk:

Permissions:

Host permissions:

<all_urls>

Content scripts matches:

*
openlinksoftware.github.io

Size:

2.41MB

Email:

su*****@openlinksw.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-19

Compare stats and ranking:

Ranking

# 5,704 ▼ 43

Other rankings

#19 in data keyword 54

#40 in handle keyword 36 ▼ 2

#41 in x data keyword 11

#45 in picture keyword 39 ▼ 2

#94 in openvpn keyword 9 ▲ 2

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Other platforms

OpenLink Structured Data Sniffer (v3.4.27)

7,000 4.56

(18)

For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

OpenLink Software Inc

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/openlink-structured-data-sniff/

Email:

su*****@openlinksw.com

Website:

http://support.openlinksw.com/

Permission Change History

2024-11-12: Version 3.3.10 → 3.4.8

Add Host permissions: <all_urls>

Add Permissions: scripting declarativeNetRequest

Remove Permissions: webRequestBlocking *://*/* file:///*/*

User Reviews

by Mi*****, 2025-09-14

by 远离*****, 2025-03-29

by 敬念*****, 2025-02-25

View all user reviews ›

Is OpenLink Structured Data Sniffer Safe?

Risk impact

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

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

Risk impact analysis details

Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

OpenLink Structured Data Sniffer is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
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