Excel & CSV tools

Files are processed on your device and are never uploaded.

• CSV to ExcelConvert CSV files to Excel (.xlsx) with correct types, locally.
• Excel to CSVConvert Excel workbooks to clean CSV files, sheet by sheet, locally.
• CSV CleanerTrim whitespace, remove duplicates and normalize dates/numbers in messy CSVs, locally.
• JSON to CSV ConverterConvert between JSON and CSV in either direction, locally.
• Remove Duplicate RowsDeduplicate CSV or Excel rows by any key columns, locally.
• Merge Excel FilesCombine multiple Excel files or sheets into one workbook, locally.
• Split CSVSplit a large CSV by row count or by the values in a column, locally.