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CSV to Excel

Convert CSV files to XLSX with selectable delimiters, text encoding, worksheet naming, and optional column auto-sizing

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About this tool

Convert CSV files to XLSX with selectable delimiters, text encoding, worksheet naming, and optional column auto-sizing

Input: .csv
Output: .xlsx

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Select a file and click Convert to get started

Convert CSV tables into an Excel workbook

CSV to Excel reads one delimited text file and creates an XLSX workbook containing a single worksheet. Choose the source delimiter and character encoding, name the worksheet, and optionally adjust column widths for easier reading.

When converting CSV to Excel is useful

  • •Open a CSV export as a worksheet for filtering and reviewing records.
  • •Convert semicolon-, tab-, or pipe-separated tables into Excel columns.
  • •Prepare a spreadsheet file for a workflow that requires XLSX instead of CSV.

How to use this tool

  1. 1.Upload one CSV file and choose its delimiter: comma, semicolon, tab, or pipe.
  2. 2.Select the source encoding, enter a worksheet name, and choose whether to auto-size columns.
  3. 3.Convert, download the XLSX, and check the headers, values, dates, and identifiers in a spreadsheet application.

How CSV values become spreadsheet cells

  • The CSV parser reads the first row as column headings and writes subsequent records beneath them.
  • The encoding selector supports UTF-8, Latin-1, ISO-8859-1, and Windows-1252.
  • The result contains one worksheet. Auto-size Columns adjusts column widths based on the written cell values; it does not apply a spreadsheet theme.

Example: convert a semicolon-separated employee export

Suppose employees.csv contains name;department followed by Alice;Engineering and Bob;Finance. Select Semicolon, keep UTF-8, and enter Employees as the sheet name. The downloaded XLSX contains an Employees worksheet with name and department columns and two data rows.

What CSV-to-Excel cannot reconstruct

  • CSV has no Excel formulas, charts, colors, merged cells, or multiple worksheets to restore.
  • The parser can infer numbers and missing values. Leading zeros in identifiers, date-like strings, and long numbers may change; verify important columns.
  • Column auto-sizing changes widths only. It does not guarantee that every long value displays fully in Excel.

If the converted spreadsheet looks wrong

  • All fields appear in one column: select the delimiter used by the source CSV.
  • Accented characters look incorrect: choose the original file encoding before converting.
  • Worksheet name rejected: use 1 to 31 characters without brackets, colon, asterisk, question mark, slash, or backslash.

Questions about this specific tool

Can I choose a semicolon or tab delimiter?
Yes. Comma, semicolon, tab, and pipe delimiters are available.
Does the encoding setting affect conversion?
Yes. The server reads the CSV using the selected UTF-8, Latin-1, ISO-8859-1, or Windows-1252 encoding.
Can I name the Excel worksheet?
Yes. Enter a valid Excel worksheet name of 1 to 31 characters. The default name is Data.
Does the converter preserve original Excel formatting?
No. CSV does not store workbook formatting. The converter creates spreadsheet cells and can adjust their column widths.