Turn Gumroad payout CSVs into monthly totals by type, fees and net.
Public source shows ISO dates and signed amounts, and the file has no currency column, so you set the currency and amounts are summed exactly as written. Buyer Name and Buyer Email are never read into the output. This is not tax advice.
Set these to match your files before you drop them. Nothing is guessed. Limits: 20 files, 40 MB each, 200 MB in total, 60,000 rows per file and 300,000 in total.
What it does
Checks the payout CSV columns, the dates and every amount. A bad row stops the file with its row number.
Questions
Which file do I use?
Drop one or many.
Why are there settings?
Number and date styles are not documented, so you tell the tool. Nothing is guessed.
Why is there no payout check?
Public source shows signed amounts, but real exports are unverified here, so the tool adds each column as written and does not decide whether a Type is income or a cost.
Why do I set the currency?
The payout CSV has no currency column, so you tell the tool. Nothing is guessed.