Sumly

Merge CSV payout exports into one clean report.
Runs entirely in your browser - nothing is uploaded.

Works with Stripe, Etsy, Amazon, or any CSV export
Auto-detects date, description, and amount columns
Free version: merge up to 2 files, export a watermarked PDF

sumly.html · works offline once downloaded

How it works: download the file above, then open it in any browser (Chrome, Safari, Firefox, Edge). No installation, no account - just open and go.

Want unlimited files, plus clean CSV and Excel export?
Get the full version on Gumroad →