Last updated: 28 October 2026
MerchLens is a Chrome extension that shows product research data (Best Sellers Rank, sales estimates, Merch on Demand detection) on amazon.com pages.
Products you view or track, BSR history, keyword results and settings are stored only in your browser (chrome.storage). MerchLens has no server and no account. We do not collect, sell or share your browsing or research data, and we use no analytics or ads.
To show BSR and sales data, MerchLens loads public amazon.com product and search pages from your browser, the same way you would open them yourself. That content is processed locally and is not sent anywhere else.
MerchLens Pro is sold through Lemon Squeezy, our merchant of record. Lemon Squeezy collects your email and payment details at checkout under its own privacy policy. When you paste a license key, MerchLens sends it to api.lemonsqueezy.com to activate and periodically validate it. MerchLens stores the key, plan name and purchase email in your browser to show your plan.
The 7-day free trial start date is saved in Chrome sync storage so it is not reset by reinstalling.
Use “Remove key from this browser” in Settings, or uninstall the extension to delete everything it stored.
Use the support contact on the MerchLens Chrome Web Store page.
MerchLens is not affiliated with Amazon.