Startup hacks and engineering miracles from your exhausted friends at Faraday

Plancha: how to flatten multi-sheet excel workbooks

Bill Morris on

This is part of our series on data science because it belongs in your toolchain.

If you work with data long enough - actually scratch that; if you work with data for more than a week - you'll run into the dreaded multi sheet (or tab) excel workbook. Sometimes the sheets are unrelated, but other times they should really all be stacked together in the same table, ideally in a more-interoperable format than .xlsx:


Enter plancha. Named for the trusty tortilla press, we built this simple CLI tool to flatten multi-sheet excel files, resolve header mismatches, and return a pipeline-friendly csv, like this:



This is a node.js tool, so use npm:

npm install plancha -g


Just feed it an input .xlsx file:

plancha -i myfile.xlsx

Happy data-pressing!