Data | Convert
Convert CSV to Excel online
Convert CSV files to XLSX in your browser with correct data types, encoding, and delimiter handling.
CSV to Excel converts a CSV file into an XLSX workbook with correct data types, delimiters, and encoding. Conversion runs in your browser and never uploads your data. Use CSV to Excel to convert CSV files to Excel format in seconds, straight from your browser.
- Free to use
- No signup
- No uploads
- Works offline
Why use CSV to Excel
- Auto-detects delimiter
- UTF-8 and BOM safe
- Preserves numbers and dates
- Files never leave your device
Conversion runs locally in your browser. Nothing is uploaded.
How to use CSV to Excel
- Add a CSV Drop your CSV file.
- Confirm delimiter Adjust the detected delimiter if needed.
- Download the XLSX Save the Excel workbook.
Benefits
Real Excel, not CSV renamed
Output is a proper XLSX with typed cells, so formulas and pivots work out of the box.
Handles messy exports
Semicolon, tab, and pipe delimiters plus European decimal formats all convert cleanly.
Private data conversion
Data stays local, which matters for HR, finance, and customer exports.
Who it is for
Finance
Loading a bank export into a monthly report Outcome: XLSX ready to pivot in Excel.
Ops
Converting a system CSV dump for a stakeholder Outcome: Formatted workbook instead of a raw CSV.
Analysts
Standardizing team CSVs into an XLSX template Outcome: Consistent input for downstream analysis.
How it works
CSV to Excel reads the CSV structure in your browser, decodes its content into an in-memory representation, then re-encodes that data as Excel. Both the decode and encode steps of CSV to Excel run on your device, so nothing is transmitted and accuracy never depends on network conditions.
Frequently asked questions
Are delimiters detected automatically?
Yes. Common delimiters (comma, semicolon, tab, pipe) are auto-detected; you can override.
Does UTF-8 with BOM work?
Yes. Non-ASCII characters and BOM markers are handled correctly.
Which delimiter is detected?
The tool auto-detects comma, semicolon, tab, and pipe. Override in options if detection is wrong.
How are dates parsed?
ISO 8601 dates convert to Excel date cells; ambiguous formats stay as text to avoid misinterpretation.
Can I convert multiple CSVs into one workbook?
Yes. Drop several CSVs and choose Merge into workbook; each becomes its own sheet named after the file.
What about UTF-8 with BOM?
Encoding is auto-detected, including UTF-8 with BOM, UTF-16, and legacy Windows-1252.
Related tools
- Excel to CSV | Convert Excel spreadsheets to CSV format
- Excel to PDF | Convert spreadsheets to PDF format
- PDF to Excel | Convert PDF tables to Excel spreadsheets
Last updated: 2026-07-09