Clean CSV / Excel

Preview your data, remove empty rows and duplicates, then export CSV or XLSX.

Choose a CSV or XLSX

10 MB • 50,000 rows • 200 columns • 300,000 cells in total

Only the selected sheet is exported, without formatting, charts or formulas. Excel formulas use their saved result (which may be stale); missing results become empty cells. Dates become ISO strings. Merged cells are flattened. Numbers and text remain distinct; nothing is calculated.

CSV exports prefix potentially formula-like text with an apostrophe. It may be visible when reimported. XLSX writes these values as text. Prefer XLSX to retain leading-zero codes in Excel.

◈ Your files stay on your device

How does it work?

01Choose a CSV or an XLSX workbook.
02Check the sheet, settings and preview.
03Clean and export your data.