XLS to XLTX Converter
Free online tool to convert XLS 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.
0 files uploaded. 100 files remaining.
Maximum file size is 1GB
How It Works
How to Convert XLS to XLTX
Click inside the file drop area to upload your XLS file or drag & drop it.
Locate your XLS file on your device—typically used for various purposes. Ensure the file is under 50MB to avoid upload issues. If the upload fails, check your internet connection or try compressing the file first.
Select XLTX as the output format and click the 'Convert' button.
Choose XLTX based on your needs—different formats suit different purposes, like JPEG for smaller file sizes. The conversion process typically takes a few seconds, depending on file size and server load.
Download the converted XLTX file instantly after conversion.
Once the conversion is complete, click the download link to save your XLTX file. You can then open it in software like a compatible viewer. If the file doesn’t download, ensure your browser allows pop-ups from RunConvert.
You can also send a link to the converted file via email. (Optional)
Enter an email address to receive a secure link to your converted file, which is useful for sharing with clients or accessing later. Links expire after 24 hours for security, and RunConvert ensures your data is protected during transmission.
Convert Your XLS files to other formats
RunConvert.com can convert your XLS files to these other formats:
Convert Your XLS files to other formats
Convert Files to XLS Format
RunConvert.com supports these converters to XLS format:
Convert Files to XLS Format
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Frequently Asked Questions
Here are some common questions and answers about xls and xltx file conversions asked by our users on RunConvert.com.
Frequently Asked Questions
Q: Is it safe to upload XLS files to RunConvert.com?
A: Totally safe. RunConvert.com encrypts your files, like a digital safe for your spreadsheets. Your data is protected.
Q: Why does my converted XLS look different?
A: Some older elements might not translate perfectly. It’s like copying a painting with modern tools. RunConvert.com does its best, but simplifying helps.
Q: How fast is XLTX conversion on RunConvert.com?
A: Super quick—just seconds! XLTX files are usually lean, so RunConvert.com processes them in a flash.
Q: What’s the best format to convert XLTX to for sharing?
A: PDF is great for sharing templates. It’s universal and keeps your design intact. RunConvert.com makes the switch seamless.
Q: Can I convert a spreadsheet to be editable in Notepad?
A: Sure—just convert it to CSV or TSV. These plain text formats open cleanly in Notepad.
Q: Can I open a converted CSV on Google Sheets?
A: Of course! Just drag and drop the file into Google Drive and open with Sheets. Works like a charm.
Q: Can I upload a file from a URL for conversion?
A: Not yet, but we’re exploring this feature. For now, you’ll need to download it and upload from your device.
Q: How can I make sure the data types stay correct after conversion?
A: Great question! Keep consistent formatting in your original file—especially dates and numbers. And double-check after converting, just in case.
Q: Why do some numbers change when I open a converted file?
A: Sometimes Excel auto-formats things weirdly—like turning long numbers into scientific notation. Try formatting cells as text before converting.
Q: Why do I see weird characters after converting?
A: It’s likely a character encoding issue. Make sure your original file uses UTF-8 to prevent display glitches.
What is XLS (Excel Spreadsheet)?
XLS (Excel Spreadsheet) is a proprietary file format developed by Microsoft for storing spreadsheet data, including rows, columns, and data cells. The format supports complex data like formulas, charts, and formatting.
XLS files are widely used for business, academic, and personal tasks requiring advanced data analysis, visualization, and reporting.
How to open XLS?
XLS files can be opened using spreadsheet programs like Microsoft Excel, LibreOffice Calc, or Google Sheets. These programs display data in a tabular format, preserving the cell structures, formulas, and formatting.
To open XLS files in Excel or Google Sheets, simply double-click the file or import it into the application.
XLS is Developed by: Microsoft
XLS was Released on: 1985
Useful Links for XLS:
How to convert XLS?
You can convert XLS files to other formats, such as CSV, JSON, or PDF, using online file converters or within spreadsheet programs. Simply upload your XLS file and select the desired output format.
In Microsoft Excel or LibreOffice, you can also save your XLS files in various other formats, like CSV or PDF, for compatibility with different applications.
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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