CSV to XLSX

Put CSV data into an Excel workbook while keeping cell values as text.

Free · No sign-up · No file upload

Drop your files here

Supported files: CSV · One file, up to 25 MB

Editing options→ XLSX

Cells are saved as text, including leading zeros, long identifiers and values beginning with =. Formulas are not executed.

How to use CSV to XLSX

  1. Choose one CSV file. Encrypted, macro-enabled and legacy Office formats are excluded.

  2. Set the delimiter and text encoding, then convert. UTF-8 is the default; tab, comma, semicolon and pipe separators are supported.

  3. Check the result in the work panel. Download the output when a file is produced.

Working with CSV to XLSX

The converter detects common delimiters or uses the one you select. Every cell is written as text, preserving leading zeros and long identifiers without evaluating formulas.

Text storage is intentional: numbers and dates will not automatically become numeric Excel cells. Choose the correct encoding if accented letters or CJK characters look wrong.

Supported files

CSV → XLSX

  • One file, up to 25 MB
  • Total input: 300 MB
  • Total output: 150 MB
  • Pages: ≤ 50
  • Maximum cells: 200,000

Example result

Before

Example result: CSV to XLSX (Before)
packing-list.csv0.1 KB

After

Example result: CSV to XLSX (After)
csv-to-xlsx-packing-list.xlsx8.6 KB

Frequently asked questions

What does CSV to XLSX preserve?
The converter detects common delimiters or uses the one you select. Every cell is written as text, preserving leading zeros and long identifiers without evaluating formulas.
What should I check when using CSV to XLSX?
Text storage is intentional: numbers and dates will not automatically become numeric Excel cells. Choose the correct encoding if accented letters or CJK characters look wrong.
How can I use the result from CSV to XLSX?
Download the XLSX and verify the columns in XLSX viewer. Convert selected cells to numbers later in your spreadsheet app when calculations are needed.
How to use CSV to XLSX
Set the delimiter and text encoding, then convert. UTF-8 is the default; tab, comma, semicolon and pipe separators are supported.
Are my files uploaded to a server?
No. Files are processed in your browser on this device and are not sent to BlurMe servers.

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