Online XLSX Converter
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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
Convert from XLSX
Quickly turn your XLSX files into any format you need
Convert to XLSX
Easily turn your files into XLSX format
🎯 Did You Know?
It’s actually a collection of mini files
Like DOCX, XLSX is really a ZIP archive containing multiple XML files. Inside, each worksheet, style, and formula is stored separately — making it easier to recover data if the file gets corrupted.
— Fact picked by Ethan Brooks
❓ Frequently Asked Questions
Answers to common questions about XLSX
- Do I need to install software to convert XLSX files?No extra software is required. Just upload your XLSX files to AnyConv, we’ll convert them on our servers, and you can download the finished file right away.
- Can I use XLSX converter on my phone or tablet?Yes, you can convert XLSX files on any device — including phones and tablets. AnyConv works perfectly on mobile.
- Is it safe to convert XLSX files with AnyConv?Yes, converting XLSX files with AnyConv is secure. All files are automatically deleted after conversion and never shared.
- Can I convert multiple XLSX files at once?Yes, our converter supports batch processing. You can upload several XLSX files and convert them all at once.