BACKLANE / TOOLS FOR SELLERS

Run the numbers. Take the next step.

Compare ad performance, calculate price thresholds or check product files. Four practical tools for your marketplace day.

No sign-up · Calculated in your browser

ROAS calculator

Compare advertising spend with attributed revenue. Add your margin before advertising to see how the numbers fit together.

Work through a sale with your variable costs. Calculate the price floor, target-margin price and discount headroom for your offers.

Check one identifier or an entire product list for structural errors. Get a clear report before looking more closely at your listings.

Check a product file against fixed rules in your browser. Map columns and identify format errors and missing basic information per item.

This tool processes your inputs locally in your browser. It does not upload your figures or files, or save them permanently.