Free Developer Tool
CSV To Excel Converter
Paste or upload a CSV file and convert it to a fully formatted Excel XLSX file instantly using SheetJS. Configure sheet name, column widths, frozen panes, header styling, and type detection. No uploads to any server, completely private.
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Drop a CSV file here or click to browse
Or paste CSV data directly into the editor below
Detected: ","
Sheet Name
Ready to convert 5 rows across 6 columns to Excel.Ready
5Data Rows
6Columns
2Numeric Cols
1Boolean Cols
244 BCSV Size
How to use the CSV to Excel Converter
Drag and drop a CSV file onto the upload area, click it to browse your files, or paste CSV data directly into the input editor
Choose your delimiter or leave it on Auto Detect and the tool will identify commas, semicolons, tabs, or pipes automatically from your data
Enable Auto-detect Numbers and Booleans to have numeric and true/false values stored as their native Excel types instead of plain text
Set a custom Sheet Name of up to 31 characters to control what the tab is called when the file opens in Excel or Google Sheets
Choose Bold Text header styling to make the first row stand out visually when the file is opened in Excel
Use Freeze Panes to lock the header row, first column, or both so they stay visible while scrolling through large datasets in Excel
Enable Auto-fit Column Widths to automatically size each column based on the longest value it contains, up to a maximum of 60 characters
Check the Column Schema tab to inspect inferred data types, non-empty counts, and sample values before generating the XLSX file
Use the Table Preview tab to visually confirm your CSV parsed correctly with the right headers and data rows before downloading
All processing happens locally using SheetJS. Your CSV data is never uploaded to any server and stays completely private
