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Free tools for online sellers.

Fee calculators, listing checkers and step-by-step guides for each marketplace — built on the platforms’ own rules. Free, no login, nothing uploaded.

Fee calculators

Listing checkers

Latest guides

Amazon

What is the Amazon referral fee? Rates by category and how it’s calculated

The Amazon referral fee is a percentage of each item’s total price — 15% in most categories, with a $0.30 minimum per item. What “total price” includes, how tiered categories work, the media closing fee, and worked examples.

Facebook Marketplace

Facebook Marketplace showing no results? Why search comes up empty

When Marketplace search finds nothing, the cause is usually your account’s access, your Marketplace location and distance, filters, or hidden categories. What Meta says about each, and how to check.

Amazon

Amazon account health: the rating and the metrics that put your account at risk

Amazon’s Account Health Rating is a 0–1,000 color-coded score of your risk of deactivation. The performance targets behind it: order defect rate under 1%, late shipment rate under 4% and cancellation rate under 2.5% for seller-fulfilled orders.

Amazon

Amazon Brand Registry requirements: what you need to enroll

To enroll in Amazon Brand Registry you need your brand name on a logo permanently on the product or packaging, and a registered or pending trademark from an office in a country with an Amazon store — and you must own it. What else you need, what you get, and the IP Accelerator route.

Amazon

Amazon Buy Box (Featured Offer): why you lost it and how to win it back

Amazon now calls the Buy Box the Featured Offer. Why your listing shows “See options”, how price, shipping speed, order experience and stock decide who is featured, and the Seller Central tools that show where you stand.

Amazon

Amazon FBA fees explained: what you pay and how to lower it

FBA costs come on top of Amazon’s selling fees: fulfillment fees by size and weight, monthly storage by cubic foot (higher in the holidays), and other costs such as aged inventory, removals and inbound placement. How to preview your exact fees in Seller Central and Amazon’s ways to reduce them.

Why seller.tips

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Fixes in priority order

Not a list of 50 tips — the few things that matter, in the order to fix them.