Data
Convert CSV to XLSX
CSV is just comma-separated text; XLSX adds sheets, formulas, formatting and column types that spreadsheet software actually reads.
When you'd use this
Importing a data export from an app or database into Excel/Google Sheets so you can filter, chart and format it, not just view raw commas.
Worth knowing
CSV has no type information, so numbers-that-look-like-dates or leading zeros (e.g. postcodes, phone numbers) can get silently reformatted — check those columns after converting.
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