openpyxl Script Builder

Load a formatted sample, then format other spreadsheets to match it.

  1. 1
    Load a sampleA spreadsheet that already looks the way you want: header rows, colors, widths, number formats.
  2. 2
    Check what was foundSee the formatting the tool picked up and untick anything you don't want copied.
  3. 3
    Format your filesAdd plain .csv or .xlsx files, or a zip of them, and download them formatted like the sample.

Drop a sample spreadsheet here

Use a .xlsx formatted the way you want your files to look. A few rows of example data help it pick up column formats and banding. Nothing leaves your browser.

What makes a good sample?
  • An .xlsx saved from Excel (or Google Sheets, or LibreOffice) with the look you want: title rows, column names, fills, fonts, borders, widths, frozen panes.
  • The column names your other files use, spelled the same way. That's how columns get matched.
  • A few rows of real-looking data under the header, so the tool can tell which columns hold dates or numbers and whether rows are banded.
  • Only the first sheet is used unless you pick another one.
Things a sample can't pass on: conditional formatting, formulas, data validation, images and comments. The tool lists any it finds.

Script

You don't need this to format files on this page. It's the same formatting as a Python script, for running on your own computer: on a whole folder, on a schedule, or without this page. It needs Python 3 and installs openpyxl on its first run.

  

        

      

      

        Advanced: formatting rules as JSON
        

          
Only checked items are included