spreadsheet / converter

CSV to XLSX Converter

Convert CSV files to XLSX format using a practical and suitable conversion workflow.

Input: CSV Output: XLSX Local-first processing

Creates a spreadsheet from plain data, but does not recreate original formulas or styling.

CSV to XLSX Converter

Convert spreadsheet and data files locally in your browser. Files are not uploaded.

Choose files

CSV delimiter

SQL table name

Choose files to begin.

How this page works

Use this page to convert CSV into XLSX. The page describes the accepted input, the expected output, and any quality or compatibility issues that matter for this conversion.

Some conversions are mainly for compatibility, while others may change quality, layout, transparency, timing, metadata, or editability. Creates a spreadsheet from plain data, but does not recreate original formulas or styling.