Privacy Policy

Last updated: July 6, 2026

Knockoff is a Chrome extension that filters pseudo-brand listings out of Amazon search results. It is built to need as little of your data as possible: no accounts, no tracking, no analytics, and no personal information collected.

What runs locally

All brand detection happens on your device, inside the extension. Your browsing activity, searches, and the pages you visit are never sent anywhere. Your settings, allowlist, and blocklist are stored using Chrome's extension storage and stay in your browser (Chrome may sync them between your own devices via your Google account's built-in extension sync).

Network requests the extension makes

• Brand list refresh. Roughly once a day the extension downloads an updated list of brand names from api.knockoff.shopping. This is a plain download; no information about you or your browsing is included in the request beyond what any HTTP request carries.
• Misclassification reports (optional, user-initiated). If you click "report" on a badge, the extension sends the brand name, the verdict it assigned, the product's ASIN, the Amazon marketplace domain, and the extension version. That's the entire payload. It contains no account information, no browsing history, and nothing that identifies you.

Report handling

Reports are stored on Cloudflare infrastructure and reviewed by hand to improve the bundled brand lists. To rate-limit abuse, the reporting server stores a salted hash of the reporter's IP address; the raw IP is not stored. Reports are kept only as long as needed for list curation.

What we never do

• No sale of data, to anyone, ever.
• No transfer of data for advertising, creditworthiness, or any purpose unrelated to the extension's single function.
• No tracking pixels, analytics, or fingerprinting in the extension.

Changes

If this policy changes, the update will be posted at this URL with a new date above. The extension's source is public at github.com/Shpigford/knockoff, so every claim here can be verified in code.

Contact

Questions: josh@joshpigford.com or open an issue on GitHub.