Afternic, Sedo, and Spaceship all want the same portfolio in different CSV shapes. Headers change. Prices drift. Empty rows slip in. One bad spreadsheet edit can touch hundreds of domains.
CSV.Domains keeps one working portfolio in the browser, then writes a marketplace file from that record when you need one.
Import a CSV, map the useful fields once, then update prices in bulk, find duplicate domains, catch missing values, and check the basic totals. The exporter handles the destination’s headers, values, and file shape.
The marketplace CSV is not the portfolio. It is a delivery file. Treating it as the source of truth is how three copies slowly stop agreeing with each other.
Everything stays in the browser. You can inspect the data, export the file, and move on without creating another account for a spreadsheet job.
The product reports things that help: counts, price ranges, missing prices, and portfolio distribution. It does not pretend it knows what every domain will sell for.