Convert XLSX to XLTM Files Online for Free.
Free online tool to convert xlsx to xltm 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 XLTM
Click inside the file drop area to upload your XLSX file or drag & drop it.
Select XLTM as the output format and click the 'Convert' button.
Download the converted XLTM 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: Can I convert a CSV to Excel without losing data?
A: Yes! Just open the CSV in Excel and save it as an .xlsx file. Boom—done. Just double-check the formatting afterward to make sure it looks right.
Q: Do colors and highlights stay after conversion?
A: Only if you convert to formats that support formatting—like XLSX or ODS. CSV and TSV don’t keep colors.
Q: What if my converted file looks different?
A: That can happen—especially when jumping between formats that support different features. Just check your data and reformat if needed.
Q: Will frozen panes or headers stay after conversion?
A: Only in XLSX or ODS. PDF will lock the view, but CSV loses frozen rows and columns entirely.
Q: Is there a difference between .xls and .xlsx conversion?
A: .XLS is older and bulkier. .XLSX is newer, smaller, and faster. We recommend upgrading during conversion when possible.
Q: What if my spreadsheet has images or charts?
A: Charts usually convert fine in spreadsheet formats, but images might not. And converting to CSV? Forget it—those are for numbers and text only.
Q: What spreadsheet formats does RunConvert support?
A: Lots! XLS, XLSX, CSV, ODS, TSV, PDF, and even HTML table formats. Basically, if it holds rows and columns—we can probably handle it.
Q: Does RunConvert support TSV (tab-separated values)?
A: Yes! We support TSV both as input and output—it’s great for clean, plain-text spreadsheets.
Q: How long does a spreadsheet conversion take?
A: Usually just a few seconds. It depends on your file size and internet speed, but it’s faster than brewing a cup of coffee.
Q: What’s the difference between XLS and XLSX?
A: Good question! XLS is the older Excel format, while XLSX is newer, smaller, and more efficient. It’s kind of like upgrading from a flip phone to a smartphone.
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 XLTm (Excel Template Macro)?
XLTm (Excel Template Macro) is a file format used for creating Excel templates that contain macros. Macros are sequences of instructions that can automate repetitive tasks in Excel, enhancing productivity.
XLTm files are used when you want to create a reusable template that includes automated functions or workflows. These templates can be used to perform actions such as data validation, complex calculations, or formatting adjustments.
How to open XLTm?
XLTm files can be opened using Microsoft Excel, which supports the format and allows users to run the macros embedded within the template. Simply double-click the file, and Excel will open it as a template.
To open XLTm files, ensure macros are enabled in Excel for the file to execute its automated functions properly.
XLTM is Developed by: Microsoft
XLTM was Released on: 2007
Useful Links for XLTM:
How to convert XLTm?
You can convert XLTm files to other formats, such as XLSX, CSV, or PDF, using Excel's 'Save As' option or online file converters. Simply open the file in Excel and choose the desired output format.
If you want to retain the macros while converting, ensure the target format (like XLTm or XLSM) supports macros to preserve the functionality.
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