Convert xls to xltx

Download and install the latest version of Filestar.
Right click on one or more Xls file(s) on your desktop and select Convert with Filestar.
Type convert to xltx in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.xls -c "convert to xltx" (how).

Let your AI agent convert XLS to XLTX

Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.

Install Filestar and add it to your agents:

npm install -g filestar
filestarcli agent install

Then ask your agent:

“Convert the XLS files in my Downloads folder to XLTX”

Or run it yourself:

filestarcli -i file.xls -c "convert to xltx"

Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.

Can my AI agent convert XLS to XLTX?

Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.xls -c "convert to xltx" on your computer, so your files stay on it.

Using Filestar With AI Agents →

What is the difference between .xls and .xltx?

Name: Excel Spreadsheet; Excel Open XML Spreadsheet Template
Extension: .xls; .xltx
Format: Binary; Binary
Category: Spreadsheet; Spreadsheet
Developer: Microsoft; Microsoft
Description: An XLS file is a spreadsheet file created by Microsoft Excel or exported by another spreadsheet program, such as OpenOffice Calc or Apple Numbers. It contains one or more worksheets, which store and display data in a table format. XLS files may also store mathematical functions, charts, styles, and formatting.; An XLTX file is a template created by Microsoft Excel, a program used for creating spreadsheets.
MIME Type: application/vnd.ms-excel; application/vnd.openxmlformats-officedocument.spreadsheetml.template
Sample: sample.xls
Wikipedia: .xls on Wikipedia; .xltx on Wikipedia

Convert Xls To Xltx Today

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Are you tired of manually creating new spreadsheets from scratch every time you need a new template? Filestar's software can help you convert XLS to XLTX with ease. Our software allows for bulk/batch conversion, which can save you both time and effort.

Filestar's software runs locally on your Windows or OSX computer, which means that your files are processed safely and securely. You don't have to worry about your files being stored in the cloud or being accessed by unauthorized parties.

Converting XLS to XLTX can be useful for a variety of professionals, including accountants, financial analysts, and project managers. For example, accountants may need to create new spreadsheets for budgeting or tracking expenses. Financial analysts may need to create new spreadsheets for analyzing data or creating reports. Project managers may need to create new spreadsheets for tracking project progress or managing resources.

With Filestar's software, you can easily convert XLS to XLTX and create new spreadsheets from templates. Our software is user-friendly and intuitive, so you don't need to be a tech expert to use it.

Don't waste any more time manually creating new spreadsheets from scratch. Try Filestar's software today and see how it can help you streamline your workflow. Contact us to learn more or to get started.