Amazon United States · Free resources
Check barcodes, restrictions and costs before buying inventory. All three tools work without registration.
Paste a barcode: it tells you whether the last digit checks out, completes it if it is missing, and spots the leading zero your spreadsheet ate.
The digits you type — nothing else. No catalogue lookup, no ASIN match: the arithmetic runs in your browser and nothing is sent anywhere.
Compare FBA and FBM profit, ROI, margin, break-even and maximum unit cost using your own shipping quote. Starting values are examples; replace them before making a purchase.
The numbers you type. Amazon's referral and FBA fees are input fields showing their default, not a silent 15% — and every figure is worked out in your browser, so nothing is sent anywhere.
Seven kinds of gate and three ways they open. Which gates exist, anyone can explain; which one applies to you, only your connected account knows.
The restriction message you paste, matched word by word against the taxonomy compiled into this page. It runs in your browser, nothing is sent anywhere, and no account is read — the page cannot see your Amazon account, only the text you give it.
Open the calculator with your unit cost, selling price and fees. Add prep, inbound and shipping where they apply. Compare profit, ROI and maximum cost, then lower the selling price to see how much margin remains.
Check the final digit and whether a spreadsheet removed a leading zero. The tool validates the code's arithmetic, but does not confirm the product it identifies or find an Amazon ASIN.
Read the restriction type and the requirements shown in Seller Central. The message reader explains the text you enter. To know what your account can sell on a particular ASIN, you need an account-specific check.
Understand Amazon selling restriction types · How to connect your account for eligibility checks
Prepare a supplier list and collect your per-unit costs. CSV files for Excel and Google Sheets, without a form.
Supplier evaluation template · Per-unit cost worksheet
These tools do not access your account or confirm restrictions for an ASIN. The calculator does not include every cost: review its visible assumptions.
Amazon wholesale supplier guide · Metrics glossary · All resources
For a full supplier list, catalog analysis matches its rows to Amazon US products. For in-store sourcing, the iPhone app scans barcodes and organizes a buy list by visit. Both workflows use a FlipIQ account; usage limits are listed on Pricing.
Wholesale catalog analysis · Retail arbitrage app for iPhone · Plans and allowances