CSV to XLSX Converter
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What is a CSV file?
CSV (Comma-Separated Values) is a simple text format for storing tabular data. Each line of the file represents a row in the table, and each value is separated by a comma or another delimiter such as a semicolon or tab.
CSV is a universal format supported by virtually all spreadsheet software, databases, and programming languages. It's popular for exporting and exchanging structured data between systems.
How to open CSV files
CSV files can be opened in virtually any spreadsheet or text editor, including Microsoft Excel, Google Sheets, and Notepad. They're widely supported for data import and export.
You can convert CSV files to XLSX, JSON, or XML using AnyConv or common data tools like Excel and Python scripts.
Key facts about CSV
- Full name: Comma-Separated Values
- Extension: .csv
- MIME type: text/csv
- Developed by: Unknown (widely adopted)
- Initial release: 1972
Useful links and resources
What is a XLSX file?
XLSX is the default spreadsheet format used by Microsoft Excel since Office 2007. It is based on the Open XML standard and stores data in cells organized by rows and columns.
XLSX files support formulas, charts, formatting, and large data sets. They are widely used for financial modeling, data analysis, and record keeping across industries.
How to open XLSX files
XLSX files can be opened with Microsoft Excel, Google Sheets, LibreOffice Calc, and many other spreadsheet applications. They are the standard format for spreadsheets today.
You can convert XLSX to PDF, CSV, or XLS using AnyConv or via built-in export options in Excel and other tools.
Key facts about XLSX
- Full name: Microsoft Excel Open XML Spreadsheet
- Extension: .xlsx
- MIME type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
- Developed by: Microsoft
- Initial release: 2007
Useful links and resources
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❓ Frequently Asked Questions
- Do I need to register to convert CSV files?Not at all! You can convert CSV to XLSX without signing up or installing anything.
- Is it safe to convert CSV to XLSX on AnyConv?Absolutely. All CSV and XLSX files are securely handled and automatically deleted after 1 hour. Nobody can access your data.
- Will the quality change after converting CSV to XLSX?We do our best to preserve the original quality during CSV to XLSX conversion. The result is accurate and clean.
- How long does it take to convert CSV to XLSX?Most conversions from CSV to XLSX take just a few seconds — even for larger files.
- Can I upload more than one CSV file?Yes, batch conversion is supported. You can convert multiple CSV files to XLSX at once — fast and easy.
- What browsers support CSV to XLSX conversion?All modern browsers! Chrome, Firefox, Safari, Edge — AnyConv runs online and supports converting CSV to XLSX on any platform.