Free tools and practical checks
Start with the decision you need to make. Convert an identifier, check a price, calculate a margin, prepare a product file, or find a prep partner. Move to a supplier-file scan only when checking products one at a time becomes too slow.
Free tools are best for spot checks, learning the steps, and cleaning a small file. They should help you inspect the evidence, not turn an uncertain product into an automatic yes.
Match the identifiers you already have to the format needed for the next lookup or spreadsheet step.
Convert a UPC into matching Amazon listing identifiers.
Use this when: a supplier file contains UPCs but your product checks need ASINs.
Convert EAN product codes into matching ASINs.
Use this when: you are working with European or international supplier barcodes.
Match book ISBNs to Amazon listing identifiers.
Use this when: a book catalog contains ISBN-10 or ISBN-13 values.
Move from an ASIN back to common barcode formats.
Use this when: you need a catalog identifier for comparison, export, or supplier reconciliation.
Test a product with visible assumptions before treating the current offer price as dependable.
Review historical pricing context for a single ASIN.
Use this when: you need to see whether today’s price is normal, seasonal, or unusually high.
Estimate Amazon fees, profit, margin, and ROI for one product.
Use this when: you have a real acquisition cost and need a transparent single-product calculation.
Turn an idea list or supplier catalog into a clean file that preserves source, cost, and review context.
Organize permitted wishlist data into a seller-ready product file.
Use this when: you have a public or properly shared wishlist and want a structured research shortlist.
Clean supplier rows, separate costs and packs, and prepare a catalog for a Rocket Source scan.
Use this when: you received a CSV or Excel wholesale catalog and need a clear review process.
Compare providers by location and services before sending inventory away from your own operation.
Search a directory of Amazon FBA prep centers and service details.
Use this when: you need a prep partner near a port, supplier, marketplace, or target region.
Move directly into state-level prep-center pages.
Use this when: location is the first constraint in your prep search.
Explore prep providers grouped by country.
Use this when: you source or sell across more than one national market.
The API pages show how to send a list of identifiers or retrieve scan results from your own software. Check the account requirements and examples before you start.
Submit UPC, EAN, or ISBN values for ASIN matching.
Use this when: your software needs to convert identifiers in batches.
Return UPC, EAN, and other identifiers for ASINs.
Use this when: your software needs catalog identifiers for a list of ASINs.
Review sourcing and scan options from one API entry page.
Use this when: your software needs completed scan results or supplier identifier matching.
Stay with a free tool while you are checking a handful of products. Move to a scan when the same lookup, cost calculation, price check, or exclusion rule must be applied consistently across hundreds or thousands of supplier rows.
See how Rocket Source analyzes supplier filesThe linked public converters, calculator, price-history checker, templates, directory, and documentation pages can be opened without a paid plan. API access and bulk product analysis have separate account and usage requirements explained on their pages.
Start with the supplier price list guide if you already have a catalog. Use a converter for a few identifiers, the FBA calculator for a clear profit estimate, and price history to test the selling-price assumption.
No. They help organize and inspect evidence. Confirm the exact listing, offer, supplier, selling eligibility, product safety, demand, price stability, and order terms before buying inventory.