Excel ↔ CSV Converter
Convert Excel files to CSV and CSV to Excel — instantly in your browser. Free, private, and fast. No upload.
Privacy: all processing is local in your browser.
Loading converter…
Why convert Excel to CSV and CSV to Excel?
CSV is a lightweight text format ideal for data import/export, APIs and analytics. Excel (.xlsx) is great for formulas and formatting. Our free online converter lets you switch between both formats instantly, without uploading files to a server.
Supported formats and delimiters
- Excel: .xlsx, .xls, .xlsm (first-class support via SheetJS)
- CSV variants: comma (,), semicolon (;), and tab (TSV)
- Unicode: UTF‑8 recommended for special characters
Tips for clean conversions
- Ensure consistent headers across sheets
- Avoid stray commas inside unquoted cells
- Prefer UTF‑8 to preserve accents and emojis
Excel ↔ CSV Converter — FAQ
Is this converter really free?
Yes — it’s 100% free and runs entirely in your browser.
Do you upload my files to a server?
No. All conversions are processed locally in your browser for maximum privacy.
Which Excel formats are supported?
.xlsx, .xls and .xlsm.
Can I convert only one sheet?
Yes, you can select the sheet and download its CSV.
How to handle semicolons or tabs?
Download as CSV then choose the delimiter in Excel or import settings of your tool.