Excel to CSV
Convert Excel spreadsheets to CSV files in your browser.
Workbook upload and CSV settings
Upload an Excel workbook to read its worksheets, or drop a CSV/TSV export. Files are parsed locally — nothing is uploaded.
Upload an Excel workbook
Supported: .xlsx. CSV and TSV exports are also accepted. Legacy .xls and .ods are not supported.
Encoding
CSV output is generated as UTF-8 text.
- Upload an .xlsx workbook (or a CSV/TSV export) to generate CSV.
CSV output and preview
Review, copy, or download the selected worksheet as CSV.
Worksheet
None
Sheet rows
0
Sheet columns
0
CSV rows
0
Delimiter
comma
Quote mode
auto
Line ending
LF
Estimated CSV size
0 B
Encoding
UTF-8
Tool support layer
Local XLSX reader
Worksheet preview
Copy / download CSV
How Excel to CSV Conversion Works
Read the workbook
The .xlsx file is opened locally as a ZIP of XML parts in your browser.
Pick a worksheet
Each sheet in the workbook can be selected and exported on its own.
Rows and cells
The used range of the sheet becomes CSV rows and fields.
Values, not styling
Text, numbers, booleans, and dates are exported as readable values.
Delimiters
A delimiter separates fields in each row.
Quotes
Quotes protect delimiters and line breaks inside values.
Data Types, Dates, and Formulas
Text
Text cells and shared strings are preserved, including Unicode.
Numbers
Numeric values keep reasonable precision.
Dates
Date cells export as readable YYYY-MM-DD instead of serial numbers.
Booleans
TRUE and FALSE values are written as TRUE/FALSE.
Formulas
Cached formula results are exported; uncached formulas keep their text and are flagged.
Empty cells
Blank cells are preserved so columns stay aligned.
What CSV Cannot Store
Formatting
Colours, fonts, borders, and styles are not stored in CSV.
Charts and images
Charts, images, comments, and objects are not exported.
Merged cells
Merged-cell layout flattens into plain values.
Macros
Macros are never executed and are not exported.
Multiple sheets
Each worksheet exports to its own CSV file.
Review output
Always review CSV before importing into another system.
Privacy and Local Processing Notes
Local conversion
Workbooks and text files are read locally in the browser.
No account
No sign-up is required.
No backend storage
This tool does not add backend storage.
No upload
Spreadsheet data is not sent to a server by this tool.
Download control
Downloaded CSV files stay under your control.
Sensitive data
Avoid uploading confidential spreadsheets unless necessary.
Method Explanation
Frequently Asked Questions
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