# Structured Data Testing Tool

> Quickly test structured data (JSON-LD, Microdata, RDFa) on any webpage with export & highlight features.

Canonical page: [https://chrome-stats.com/d/structured-data-testing-tool](https://chrome-stats.com/d/structured-data-testing-tool)

## Overview

- **ID:** `structured-data-testing-tool`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Mr Peter Russell
- **Category:** other
- **Daily users:** 5
- **Weekly downloads:** 1
- **Version:** 1.3
- **Last updated:** 2025-09-08
- **First published:** 2025-09-05
- **Size:** 15 KB
- **Data as of:** 2026-09-09
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/structured-data-testing-tool/)
- **Website:** [https://okfun99.com/](https://okfun99.com/)

## Description

Quickly test structured data (JSON-LD, Microdata, RDFa) on any webpage with export & highlight features.

## Rankings

- #44,843 — Overall
- #31 — testing
- #93 — data
- #210 — x data

## Permissions and access

### Permissions

- `tabs`
- `activeTab`
- `storage`
- `downloads`
- `<all_urls>`

### Content script matches

- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/structured-data-testing-tool)