Privacy Policy

Last updated: February 22, 2026

Introduction

This privacy policy describes how LeetCat ("the Extension", "we", "our") handles information. LeetCat is a Chrome browser extension that provides algorithm hints and solution guidance for LeetCode problems. We are committed to protecting your privacy.

Information We Collect

None. LeetCat does not collect any information whatsoever. Specifically, we do not collect:

• Personal information (name, email, address, etc.)
• Browsing history or browsing activity
• Cookies or tracking identifiers
• Usage analytics or telemetry data
• LeetCode account information or credentials
• Problem-solving activity or progress
• IP addresses or device identifiers
• Any other form of user data

How the Extension Works

LeetCat operates entirely offline using a static database of algorithm hints bundled within the extension. When you click the extension icon on a LeetCode problem page:

• The extension reads the problem URL from the active browser tab
• It matches the problem slug against its local, built-in database
• It displays the algorithm hint in a popup window

This entire process happens locally on your device. No data is sent to any external server, API, or third-party service.

Network Requests

LeetCat makes zero network requests. The extension does not communicate with any server, endpoint, or remote service. All functionality is self-contained within the extension package installed on your browser.

Permissions

LeetCat requests only the activeTab permission. This allows the extension to read the URL of the currently active tab when you click the extension icon, so it can identify which LeetCode problem you are viewing. This permission:

• Only activates when you click the extension icon
• Only reads the page URL to extract the problem identifier
• Does not access page content, form data, or any other information
• Does not grant background or persistent access to your browsing

Third-Party Services

LeetCat does not integrate with, send data to, or use any third-party services, analytics platforms, advertising networks, or external APIs.

Data Storage

LeetCat does not store any user data, locally or remotely. The only data present in the extension is the pre-built problem database, which is read-only and identical for every user.

Children's Privacy

Since LeetCat collects no data from any user, it does not knowingly or unknowingly collect data from children under the age of 13 (or any other age).

Changes to This Policy

If we ever update this privacy policy, the changes will be reflected on this page with an updated "Last updated" date. Since LeetCat collects no data, we do not anticipate material changes to this policy.

Contact

If you have any questions or concerns about this privacy policy, you can reach us through our GitHub profile.