Privacy Policy

Last updated: July 31, 2026

1. Data Collection

Amazon Listing Byte Checker is a pure frontend tool. All calculations, including UTF-8 byte counting, invisible character detection, and risk word highlighting, happen entirely in your browser. We do not collect, store, or transmit any personal data or listing content you paste into the tool.

We do not operate any backend server or database. Your listing text never leaves your device.

2. LocalStorage

We use the browser's LocalStorage API to remember your preferences, such as your selected Amazon marketplace (e.g., US, UK, DE). This data is stored locally on your device and is not sent to any server.

LocalStorage does not store any sensitive information, listing content, or personally identifiable information. You can clear this data at any time by clearing your browser's site data.

3. Microsoft Clarity & Cloudflare Analytics

We use Microsoft Clarity to collect anonymized usage data, such as session recordings, heatmaps, and click tracking. This helps us understand how the tool is used and improve its features.

Clarity collects aggregated, anonymized data. We do not send any listing content or personal input to Clarity. You can opt out of analytics by using a browser extension that blocks tracking scripts.

We also use Cloudflare Analytics for traffic metrics such as page views, visitor geography, and bandwidth usage. Cloudflare Analytics is built into our hosting platform and does not require additional tracking scripts.

4. Cookies

This website uses minimal cookies. Microsoft Clarity may set cookies to distinguish unique users. These cookies are managed by Microsoft and follow Microsoft's privacy policy.

We do not use cookies for advertising purposes in V1.0. When AdSense is activated in a future version, additional cookies may be used, and we will update this policy accordingly.

5. Third-Party Services

We use the following third-party services:

Affiliate links (e.g., to Helium 10, Jungle Scout) redirect through our /go/ directory. These third-party tools have their own privacy policies that govern any data you provide to them.

6. Contact

If you have any questions about this Privacy Policy, please contact us at:

[email protected]