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Convert CSV to a downloadable Excel file (.xlsx). Opens in Microsoft Excel and Google Sheets. No account required.
Excel often misreads CSV encoding, especially UTF-8 files without a byte order mark. On systems set to a European locale, Excel expects semicolons as the delimiter and misparsed comma-separated data into a single column. Opening the file via File > Open triggers a text import wizard that most users find unfamiliar. Converting to XLSX explicitly bypasses all of this because XLSX stores data in a structured format that Excel reads without any guessing.
Excel also auto-formats certain values on import. Product codes that are numeric strings like "00123" lose their leading zeros when Excel decides they should be numbers. Dates get reformatted according to regional settings. Exporting directly to XLSX with cell types set to text preserves values exactly as they appear in the CSV.
The output is a single worksheet named Sheet1. Headers appear in row 1. Data rows start from row 2. Cell types are all set to text (string) to preserve values exactly as they appear in the CSV. This means a value like "01234" remains "01234" and is not treated as the number 1234.
The file uses the modern Office Open XML format (XLSX), not the legacy XLS binary format. All versions of Microsoft Excel since 2007, LibreOffice Calc, and Numbers on macOS open XLSX natively without requiring additional software.
An XLSX file is far easier to share with finance teams, operations staff, or clients than a raw CSV. It opens with a double-click in Excel without any import wizard. Columns are already separated. The recipient can apply filters, sort the data, or add their own formatting without any setup. For reports, client deliverables, or any dataset handed off outside a technical team, XLSX is the safer choice.
Google Sheets also accepts XLSX uploads via Google Drive and renders them correctly without additional configuration. Recipients on Google Workspace can open the file from an email attachment or Drive link immediately.
Does the .xlsx file have any formulas or formatting?
No. The output is plain data with no cell formatting, no formulas, and no styles. The header row has no special styling. You can apply formatting manually in Excel after opening the file.
Can I open it in Google Sheets?
Yes. Upload the .xlsx file to Google Drive and open it with Google Sheets. It renders correctly without requiring any import configuration.
What encoding does the output use?
XLSX stores strings as Unicode internally, so accented characters, Chinese text, Arabic, and all other non-ASCII content are preserved correctly regardless of the original CSV encoding.