Combine dozens of CSV exports into one auditable file in seconds. This dependency-free Python toolkit merges every CSV in a folder and adds the original source filename to every output row.

Choose union mode to preserve every discovered column, or intersection mode to keep only columns shared by every input file. You receive reusable Python source code, two example monthly exports, automated tests and a concise usage guide.

No subscription, API key or third-party package is required. Your data stays on your computer. Ideal for monthly reports, ecommerce exports, survey batches, accounting files and operational data consolidation. Requires Python 3.10+. Commercial use in your own workflows is allowed; redistribution or resale of the source is not included.