Skip to main content
Seller Margin Lab

Effective August 23, 2026

Privacy policy

Your CSV stays in your browser

Seller reports selected in the analyzer are read and calculated locally by JavaScript running in your browser. The application does not upload, transmit, or store the CSV, its rows, buyer names, order IDs, financial amounts, or calculated results on an application server.

Analyzer state is held temporarily in browser memory and is cleared when you refresh or close the page. The site does not currently create user accounts or save analysis history.

Website analytics

The site uses Vercel Web Analytics to understand aggregate traffic such as page views, referring pages, approximate location, browser, operating system, and device type. Vercel states that Web Analytics stores anonymized data and does not use cookies. CSV contents and calculator inputs are not included in analytics events.

Vercel may also process ordinary hosting and security information needed to serve the website. Review the Vercel Web Analytics privacy documentation for details.

External links

Pages may link to Whatnot, Vercel, or other external websites. Their privacy practices are governed by their own policies. Following an external link leaves this site.

Future features

This policy will be updated before introducing accounts, payments, server-side file storage, advertising identifiers, or email collection. Material changes will be reflected by a new effective date on this page.

Children

This business-analysis utility is not directed to children under 13 and does not knowingly request personal information from children.