Import Fixed-Width Text Files in LibreOffice Calc

LibreOffice Calc provides a built-in Text Import wizard that allows you to easily parse fixed-width text files into structured spreadsheets. By utilizing the visual preview ruler, you can set custom column breaks, adjust line positions, define specific data formats for each column, and ensure your data imports accurately. This guide walks you through the step-by-step process of opening fixed-width files and managing custom column break lines.

1. Open the Text File in LibreOffice Calc

  1. Launch LibreOffice Calc.
  2. Go to File > Open (or press Ctrl + O).
  3. In the file picker, locate your fixed-width file (typically a .txt, .csv, .dat, or .prn file) and click Open.
  4. Calc will automatically display the Text Import dialog window.

2. Select the Fixed Width Option

  1. Locate the Separator Options section in the middle of the dialog.
  2. Select the Fixed width radio button instead of “Separated by”.
  3. The lower section of the window will display a visual ruler and a preview table containing your raw text data.

3. Set and Manage Custom Column Break Lines

Use the interactive ruler above the data preview to define where columns should split: * Add a column break: Click on the ruler at the exact character position where you want to split a column. A vertical line with an arrow marker will appear. * Move a column break: Click and drag the arrow marker at the top of the line to the left or right to adjust the column boundary. * Delete a column break: Click directly on an existing arrow marker to remove the break line and merge the adjacent columns.

4. Configure Column Data Types (Optional)

  1. Click inside any column in the preview table to select it.
  2. In the Column type dropdown menu above the preview pane, choose the appropriate data format:
    • Standard: Automatically detects numbers and text.
    • Text: Preserves leading zeros and prevents numbers from converting to numerical formats.
    • Date: Sets a specific date format (e.g., YMD, MDY, DMY).
    • Hide: Excludes the selected column from being imported.

5. Finalize the Import

  1. Verify that all column break lines align correctly with your data fields across multiple rows.
  2. Click OK at the bottom-right of the Text Import dialog.
  3. Calc will process the file and populate the spreadsheet with your cleanly separated data columns.