CSV & Excel Converter
Convert CSV data to an Excel worksheet or export one Excel worksheet as CSV while keeping identifiers as text.
Explore the tool with example spreadsheet data before using your own file.
Limits: 50,000 data rows and 500,000 cells per result. Excel files: one selected worksheet per file. Only table values are exported.
Result preview
Preview shows up to 20 rows and 12 columns. Downloads contain the full result.
Protection prefixes formula-like cells with an apostrophe. This changes their exported text. XLSX results use text cells.
How to use this tool
- Choose a CSV, TSV or Excel file.
- For an Excel workbook, choose the worksheet to export. Select CSV or Excel as the output format.
- Preview the displayed values, then download the converted file.
What to check
This converts table values, not a complete workbook. Formulas are not recalculated; cached displayed results are used when available. Styles, charts, macros and other worksheets are not carried over. Excel output uses text cells to preserve identifiers.
Does this tool upload my files?
No. Processing happens in your browser. The tool does not send spreadsheet contents to Tech Tycoon or to an AI service. Your original file is unchanged.