Convert XLSX Files Online for Free.
Free online tool to convert xlsx files quickly and securely. No installation required – start converting your files in just a few clicks!
Drag and drop your files here or click to upload.
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Maximum file size is 10MB
How It Works
How to Convert XLSX
Click inside the file drop area to upload your XLSX file or drag & drop it.
Choose the format you want to convert your XLSX file to and click 'Convert'.
Download your converted file instantly after conversion.
You can also send a link to the converted file via email. (Optional)
Convert Your XLSX files to other formats
RunConvert.com can convert your XLSX files to these other formats:
Convert Your XLSX files to other formats
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Frequently Asked Questions
Here are some common questions and answers about xlsx file conversions ask by our users on RunConvert.com.
Frequently Asked Questions
Q: Why does my CSV look weird in Excel?
A: Ah, the classic comma confusion. Sometimes Excel misreads delimiters—especially if your system uses semicolons instead. Try importing the CSV using Excel's 'Data > From Text' feature and set the correct separator.
Q: Can I convert Excel macros too?
A: Short answer: not really. Most formats don’t support macros. So if you rely on those sweet VBA scripts, keep the file in Excel format.
Q: Can I convert a spreadsheet to use in a mobile app?
A: Yes! Many mobile apps work well with CSV, XLSX, or even JSON if you’re importing data programmatically.
Q: Why are my special characters messed up after converting to CSV?
A: It’s usually an encoding issue. Try using UTF-8—it handles most characters from around the world. We support that on RunConvert too.
Q: Why would I need to convert a spreadsheet to PDF?
A: Sometimes, you want to share your data without others editing it. PDFs lock in the look and feel of your sheet, making it great for reports or presentations.
Q: Does RunConvert have file size limits?
A: We allow generous file sizes, but there’s a cap (around 100MB for now). Most spreadsheets fall well under that, though.
Q: Can I convert Google Sheets using RunConvert?
A: Yes—just download your Google Sheet as an Excel, CSV, or PDF file first, then upload it to RunConvert.
Q: Do I need an account to convert files on RunConvert?
A: Nope. No logins, no email walls—just upload your file and get your download. It’s as breezy as it gets.
Q: What’s the best format for importing data into databases?
A: Usually CSV. It’s clean, lightweight, and plays nice with MySQL, PostgreSQL, and pretty much every database on the block.
Q: Do formulas still calculate after converting XLSX to ODS?
A: In most cases, yes. Excel and LibreOffice play nicely together—but complex macros or newer functions might act up a bit.
What is XLSX (Excel Spreadsheet)?
XLSX (Excel Spreadsheet) is a file format used by Microsoft Excel to store spreadsheets. It is a more modern and efficient version of the older XLS format and is based on XML (Extensible Markup Language).
XLSX files can store multiple sheets, data tables, charts, graphs, and more complex data structures. This format is widely used for organizing, analyzing, and visualizing data.
How to open XLSX?
XLSX files can be opened using spreadsheet programs like Microsoft Excel, Google Sheets, LibreOffice Calc, and Apple Numbers. These applications fully support the features of XLSX files, such as multiple sheets, formulas, and charts.
To open XLSX files in Excel or Google Sheets, simply double-click the file or import it directly into the application.
XLSX is Developed by: Microsoft
XLSX was Released on: 2007
Useful Links for XLSX:
How to convert XLSX?
You can convert XLSX files to other formats, such as CSV, PDF, or JSON, using online file converters. Upload the XLSX file and choose the desired output format.
Many spreadsheet applications like Excel also allow saving XLSX files in other formats, enabling cross-platform compatibility.
What Our Users Say
Don't take our word for it – here's what users think about Runconvert.
Saved me hours of work
I had to convert multiple PDFs to Word for editing. This tool made it so easy and preserved all the formatting perfectly. The batch processing feature is a game changer.
Michael T
Professional quality
As a graphic designer, I need reliable conversion tools. This site delivers professional quality every time. The image conversions maintain resolution and color accuracy.
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Fast and reliable
I've tried many conversion tools but this one is by far the fastest and most reliable. No watermarks, no quality loss, and the interface is so intuitive.
David K
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