CSV to XLSX
Change CSV to XLSX and keep the quality you need. Free for up to 10 files a day, no sign-up.
Your files
Drop your .csv files here
or
You can add several files and convert them together.
How to convert CSV to XLSX
Turn a CSV export into an Excel workbook so you can add formatting, formulas and charts, and so leading zeros and long numbers are stored properly.
- Drop your CSV file into the box above, or add it from a link.
- XLSX is already selected. Use the settings button next to it to change size, quality or other options.
- Select Convert, then download your XLSX file.
To do this from your own code, call the FileForge API with "output_format": "xlsx".
Good to know
- The data lands in a single sheet.
- Check columns like phone numbers and IDs; Excel may treat long numbers as numbers rather than text.
About the formats
.csv
CSV is a plain-text table: one row per line, values separated by commas. Every spreadsheet, database and programming language can read it, but it holds only values, with no formatting, formulas or multiple sheets.
.xlsx
XLSX is the Microsoft Excel workbook format. It keeps formulas, multiple sheets, formatting and charts.
Questions
Why does Excel mess up my CSV?
Opening a CSV directly lets Excel guess each column's type, which can drop leading zeros or change dates. Converting gives a proper workbook you can then format.
Are my files private?
Your files are uploaded over HTTPS to a private link only you have. Originals and results are deleted automatically after 24 hours, or straight away when you remove them.