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xlsx-to-csv

Converts XLSX spreadsheets, including multi-sheet workbooks, into CSV files that can be read and grepped directly. Use whenever an .xlsx report needs processing — exports from Xero, Cryptio, bank statements, or any tool that delivers spreadsheet output.

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XLSX to CSV

When to use

Any time you need to read or grep the contents of an .xlsx file in text form. The Read tool cannot render .xlsx directly; convert to CSV first.

Single-sheet XLSX

LibreOffice headless conversion works:

libreoffice --headless --convert-to csv --outdir /path/to/outdir /path/to/input.xlsx

Output: outdir/input.csv (the active sheet only).

Multi-sheet XLSX

LibreOffice's --convert-to csv only emits the active sheet, so hidden sheets get dropped silently. For multi-sheet files use xlsx2csv via uvx (no permanent install needed):

uvx --from xlsx2csv xlsx2csv -a /path/to/input.xlsx /path/to/outdir/

Output: one CSV per sheet, named after the sheet (with spaces preserved).

If you don't know whether a file is multi-sheet, default to xlsx2csv — it handles single-sheet files fine too.

Files served with the wrong extension

Some tools deliver XLSX content with a .zip extension (e.g. Cryptio's Trial Balance download). Inspect with unzip -l file.zip — if you see xl/workbook.xml or [Content_Types].xml, it's an XLSX. Rename to .xlsx and convert as normal.

Pitfalls

  • LibreOffice silently emits the active sheet only — running it on a multi-sheet file looks successful but discards hidden sheets. Always check sheet count via unzip -l file.xlsx | grep worksheets/sheet.
  • xlsx2csv requires an output directory for -a; it will not write to stdout when emitting multiple sheets.
  • Empty rows in the source are emitted as commas-only lines; filter with grep -v '^,*$' if they're noisy.

レビュー

まだレビューはありません。使ってみた感想をお寄せください。

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