Every data job I've ever touched starts the same way: someone hands me an export that's almost usable. Duplicated rows. Columns named "Order Date " . Numbers stored as text. I kept writing the same cleanup snippets over and over, so I turned them into five small command-line tools. They have zero dependencies (just Python 3.8+), each one does exactly one job, and every one of them prints a summary of what it changed so you can trust the output. Here's what each tool does and how to use it....