Spreadsheet / Data
Excel to CSV Cleaner
Convert an Excel sheet to clean CSV in your browser.
Your data never reaches us
Nifty Utilities has no backend server, database, user accounts, or endpoint capable of receiving your tool inputs. Files and entries are processed inside your browser. We cannot view, capture, or store them.
How do you convert an Excel file to CSV in your browser?
Many data workflows require CSV but start with an Excel workbook. This tool converts the first sheet of an Excel file directly to a clean CSV in your browser, stripping the binary spreadsheet format and producing a plain-text comma-separated file you can use with any data tool, import process, or script.
How to use it
Upload an Excel file in .xlsx or .xls format. You can also upload a CSV directly if you want it cleaned of blank rows. Click Process file and the tool reads the first worksheet, removes entirely blank rows, and presents a preview of the result with a row count. Download the CSV when you are satisfied with the output. Everything is processed in your browser and never uploaded to or stored by this site.
Tips
Only the first worksheet is converted. If your workbook has multiple sheets and you need a different one, rearrange the tabs in Excel to put the target sheet first before uploading. Formulas in Excel cells are evaluated to their current values in the output, not exported as formula text. Merged cells may not translate cleanly; unmerge them in Excel before converting if you need precise column alignment in the CSV.
Frequently asked questions
Does the tool convert all sheets in the workbook?
No. Only the first sheet is converted. If you need multiple sheets as separate CSVs, move each sheet to the first position in turn and convert them one at a time.
What happens to dates and numbers formatted in Excel?
Dates and numbers are exported as the values Excel has stored, which may appear as serial numbers for dates or with different decimal formatting than what you see on screen. If date formats matter, verify them in the downloaded CSV and reformat as needed in a spreadsheet application.
Important
This tool provides estimates and general-purpose documents, not financial, tax, legal, or professional advice. Verify important results before relying on them.
Support
Problem with this tool or suggestions for improvement? Please email support@niftyutilities.com.