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Free Tools

Free Tools for Multichannel Sellers

Tools from everyday marketplace selling: what is really left after fees, what an e-invoice actually contains and whether an IBAN is correct. All of them run directly in your browser.

Free

Marketplace Fee Calculator

Same item, several channels: see at a glance what is left per sale after commission, payment fees, shipping and returns.

  • Amazon, eBay, Etsy, OTTO, Kaufland, ABOUT YOU and your own shop compared
  • Profit, margin and break-even price per channel
  • Fee rates with date and source
Open calculator
Free

E-Invoice Viewer

Drop an XRechnung or ZUGFeRD PDF into the window and read it like a normal invoice. The file never leaves your browser.

  • XRechnung (UBL and CII) and ZUGFeRD / Factur-X
  • Basic check of mandatory fields and totals
  • Several files at once, CSV export
Open viewer
Free

IBAN Checker

Check an IBAN before you transfer or refund money. For German IBANs you see the bank, BIC and city.

  • Check digits, length and format for all IBAN countries
  • Bank and BIC from the Bundesbank bank sort code file
  • Check several IBANs at once
Check IBAN
SaleVali

What if this ran automatically every day?

SaleVali connects your marketplaces and shops, creates invoices and credit notes from your orders with an e-invoice per ZUGFeRD 2.2 (EN 16931) and provides them for your accounting via DATEV export. Try it free for 30 days.

Start Now from €0 Live Demo

Fee rates as of 14/10/2026. All information without guarantee. Amazon, eBay, Etsy, OTTO, Kaufland and ABOUT YOU are trademarks of their respective owners.