AMZBase - Free Amazon Product Research Tool

AMZBase is a free product research tool for Amazon sellers. It renders ranking, offer, listing and chart-link data directly on Amazon search, category and product detail pages, so research data is available without leaving the page.

• No registration
• No login
• All settings stored locally
• No collection of Amazon account information or browsing history

Search and category page data cards — at-a-glance information, no need to open the product detail page.

On Amazon search results, category pages and Best Sellers lists, AMZBase renders a data card under each product, displaying:
• ASIN, with a one-click copy button
• Best Sellers Rank, including the subcategory rank where applicable
• Lowest Fulfilled-by-Amazon (FBA) offer price
• FBA seller count
• A "Sold by Amazon" indicator when Amazon itself is on the offer list
• A green indicator when an FBA offer sits at least 30% above the lowest offer (a possible arbitrage signal)

Data cards render automatically once the page loads. The request rate to Amazon's detail endpoint is configurable in settings (default 500 ms) to limit interaction with Amazon's anti-bot system.

Hover chart preview

Hovering over a product image opens a popup containing the price-history chart (CamelCamelCamel) and the rank-history chart (Keepa). Holding Cmd or Ctrl while hovering pins the popup; the popup can be configured to anchor to the top-right corner of the viewport instead of following the cursor.

Search suggestion expander

When typing into the Amazon search bar, AMZBase adds a column of additional keyword suggestions next to Amazon's native dropdown. Suggestions are generated from seven concurrent variations of the typed query: terms appearing before the phrase, terms appearing after, terms appearing between the words of multi-word phrases, and three connector variants ("for", "and", "with"). Results are deduplicated against Amazon's own suggestions and grouped by category. The expander can be disabled in settings.

Product detail page side panel

On any product detail page, a side panel can be opened on the right of the page from the toolbar action button. The panel contains:
• Quick navigation: About, Similar items, Product Information, A+ Content, Videos, Description, Reviews
• Pre-filled outbound links: CamelCamelCamel, Keepa and the Amazon Seller Central Revenue Calculator (FBA fee estimator), each scoped to the current ASIN and the current marketplace
• Per-field action toolbars on ASIN, brand and UPC: copy to clipboard; search Amazon, Google, eBay, AliExpress
• A formatted view of the product's specification tables (dimensions, weight, technical details)

Captcha handling

When Amazon returns a verification page, AMZBase pauses its background data requests and presents the captcha in a focused popup iframe. The data request queue resumes once the captcha is solved or the popup is dismissed.

Supported marketplaces

The same tool and the same workflow apply across every Amazon marketplace AMZBase supports — including the United States, United Kingdom, France, Germany, Italy, Spain and Japan, with 20+ marketplaces in total. The marketplace is detected from the current page URL; no per-region setup is required.