Privacy Policy — Blanx Chrome Extension

Effective Date: June 23, 2026

1. Introduction

This Privacy Policy describes how the BlanxChrome extension handles information. Blanx is a study tool that lets you hide ("blank out") selected words on web pages and in PDFs so you can quiz yourself by recalling them.

2. Data Collection

Blanx does not collect any personal data. It has no accounts and never asks for your name, email, or any identifying information.

Blanx collects limited, anonymous usage analytics to understand how the extension is used and to improve it — for example, when it is installed, updated, turned on or off, when a blank is created, and when answers are checked. These events are tied only to a random, anonymous identifier generated on your device. They are not linked to your identity and contain no page content. Blanx shows no advertising.

3. How Your Content Is Handled

  • PDFs you open with Blanx are read locally in your browser.
  • Blanx is off by default. When you turn it on from the toolbar popup, it stays on across the pages you browse until you turn it off. While on, Blanx reads and modifies the pages you visit only to replace the words you highlight with blank fields. This happens entirely in your browser.
  • The words you choose to blank out and the answers you reveal are kept only in your browser's memory for the duration of your session.
  • Your page content, PDFs, and the specific words you blank out are never uploaded, synced, or shared. The only data that leaves your device is the anonymous usage analytics described in Section 2.

4. Permissions and Why They Are Needed

Blanx requests the minimum permissions required to function:

  • declarativeNetRequest — used to detect when you open a PDF and redirect it to the Blanx viewer so the blanking tools can run.
  • scripting — used to add the blanking tools to the pages you browse while Blanx is turned on. Blanx is off by default and runs nothing until you turn it on.
  • storage — saves your on/off choice on your device so Blanx remembers it. This setting stays on your device and is never transmitted.
  • Host access (<all_urls>) — required so the PDF redirect works on any website, and so Blanx can add its blanking tools to the pages you visit while it is turned on. Blanx reads page content only while you have it turned on, and never sends it anywhere.

5. Third-Party Services

Blanx uses PostHog, a product-analytics service, solely to process the anonymous usage analytics described in Section 2. No personal data or page content is sent to PostHog. Blanx uses no other third-party services, SDKs, advertising, or trackers.

6. Children's Privacy

Blanx collects no personal data and does not knowingly collect information from anyone, including children under 13.

7. Changes to This Policy

If this policy ever changes, the updated version will be published at this same URL with a new effective date.

8. Contact

Questions about this policy:

Email: hello@learnology.tech