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OpenLink Structured Data Sniffer

Chrome extension by OpenLink Software · Productivity · Developer

  • Featured
  • Established publisher

A Chrome extension in Productivity · Developer with 7 000 users, a small but real audience.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 4 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
7 000
Rating
4.6 (18 ratings)
Users, last 17 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
3.4.27
Updated in the store
2025-08-18
Published
2015-12-14
Manifest
V3
Browser access
5 permissions, 1 site pattern

How it has moved

Users
unchanged since 01.09
7k · 2 readings
  1. 2026-09-017k
  2. 2026-09-177k
Rating
unchanged since 01.09
reviewsrating 4.56 · 2 readings
  1. 2026-09-01reviews18rating4.56
  2. 2026-09-17reviews18rating4.56
Users
unchanged since 01.09
7k · 2 readings
  1. 2026-09-017k
  2. 2026-09-177k
Rating
unchanged since 01.09
reviewsrating 4.56 · 2 readings
  1. 2026-09-01reviews18rating4.56
  2. 2026-09-17reviews18rating4.56

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Every site you visit. This extension can read and change the content of any page you open.

  • Watch the network requests your browser makes webRequest
  • Block or redirect requests by rules it declares in advance declarativeNetRequest
  • Run its own code on the pages it can access scripting
Show the remaining 2
  • Add items to the right-click menu contextMenus
  • Store data in your browser storage

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

OpenLink Software publishes 2 listings we track, 7k users between them.

  1. OpenLink YouID OpenLink Software · Lifestyle · Social · published 2016-11-10 55 users

Like this one

Listings the catalog judges closest in what they say they do.

  1. Schema for JSON Detector for Structured Data, Microdata, and RDFa 🔎 Describes nearly the same job, smaller audience 48 users
  2. Schema Viewer Describes nearly the same job, smaller audience 28 users
  3. Meta SEO Viewer by AIO.com.ai Describes nearly the same job, smaller audience 2 users (last published figure)
  4. Schema DevTools Describes nearly the same job, smaller audience 7 users
  5. enhancely Schema Viewer Describes nearly the same job, smaller audience 76 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.