Convert XLSX to XLTX Files Online for Free.
Free online tool to convert xlsx to xltx 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 to XLTX
Click inside the file drop area to upload your XLSX file or drag & drop it.
Select XLTX as the output format and click the 'Convert' button.
Download the converted XLTX 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
Convert Files to XLSX Format
RunConvert.com supports these converters to XLSX format:
Convert Files to XLSX Format
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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: 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: How do I fix broken rows or columns after conversion?
A: That’s often a delimiter issue. Try opening the file in a text editor to see if commas or tabs are breaking the layout, then import it properly.
Q: What’s the most universal spreadsheet format?
A: CSV, hands down. It’s readable by almost every spreadsheet program, script, and database. It’s the Swiss Army knife of spreadsheet formats.
Q: Does RunConvert modify my spreadsheet data?
A: Nope. We just transform the file structure—your original data stays untouched and private.
Q: Can I convert a spreadsheet to HTML?
A: Yes! It’ll turn your spreadsheet into a web-friendly table that you can embed or share. Super useful for data reports or dashboards.
Q: Can I convert spreadsheets that contain dropdowns or validations?
A: Yes, but only to formats like XLSX or ODS. Those features don’t carry over to CSV or PDF.
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.
Q: What’s the best format to share spreadsheet data online?
A: If it’s just raw data, go with CSV—it’s light and loads fast. If you want to keep formatting, PDF or XLSX are your best bets. Depends who you’re sharing with and how much you want them to fiddle with it.
Q: How do I convert an Excel spreadsheet to Google Sheets?
A: Easy-peasy. Just upload your Excel file to Google Drive, right-click it, and select 'Open with > Google Sheets.' From there, you can save it as a native Google Sheet.
Q: Can I convert spreadsheets with multiple tabs?
A: Yes, but not all formats support multiple sheets. XLSX and ODS do, but CSV flattens everything into one sheet. If tabs matter, avoid CSV.
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 is XLTX (Excel Template)?
XLTX (Excel Template) is a file format used by Microsoft Excel to store spreadsheet templates. These templates can include predefined formatting, formulas, and layouts, making it easier to create consistent and professional-looking spreadsheets.
XLTX files are commonly used in business environments for creating standardized financial reports, invoices, and other recurring documents.
How to open XLTX?
XLTX files can be opened using Microsoft Excel or other spreadsheet software that supports the format, such as LibreOffice Calc or Google Sheets.
For editing, you can use Microsoft Excel or any other compatible spreadsheet software to modify the template as needed.
XLTX is Developed by: Microsoft
XLTX was Released on: 2007
Useful Links for XLTX:
How to convert XLTX?
To convert XLTX files to other formats like XLSX or CSV, use our online spreadsheet converter. Upload your XLTX file, select the desired output format, and start the conversion.
Our converter ensures high-quality conversion, preserving the original template layout and data for seamless use across various platforms.
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