XLTX to XLSX Converter
Convert your XLTX Excel spreadsheet template into an editable XLSX workbook for Excel, Google Sheets, and Apple Numbers. Process securely online and download free.
Drop your XLTX files here
Up to 50MB per file.
Files are encrypted and auto-deleted after conversion
How to Convert
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Upload your XLTX files
Drag and drop or select XLTX files from your device. You can upload multiple files at once.
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Configure Output
Start the conversion. Crest Convert will prepare the XLSX file using the appropriate format engine.
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Download XLSX files
Once conversion finishes, download your files individually or as a compressed ZIP archive.
Why convert XLTX to XLSX?
XLTX is a modern Microsoft Excel spreadsheet template used for reusable worksheets, consistent cell styles, and structured reports. Converting it to XLSX creates the current Microsoft Excel workbook format with worksheets, formulas, and formatted cells, ready for workflows that use the destination format.
XLSX opens in Microsoft Excel, Google Sheets, Apple Numbers, and LibreOffice Calc.
Frequently Asked Questions
How do I convert XLTX to XLSX?
Add your XLTX Excel template, start the conversion, and download an editable XLSX workbook ready for Excel, Google Sheets, and Apple Numbers.
What is an XLTX Excel template?
XLTX is the modern Microsoft Excel template format used for reusable worksheets, consistent cell formatting, and structured spreadsheet workflows.
What does converting XLTX to XLSX do?
The converter reads your XLTX template and creates an editable XLSX workbook ready for Excel, Google Sheets, and Apple Numbers.
Can I edit the converted XLSX spreadsheet?
Yes. The converter creates a genuine XLSX spreadsheet with supported worksheet content, cell values, and structure ready for compatible apps.
Can I convert several XLTX templates?
Yes. Add multiple XLTX files and download a separate XLSX result for each spreadsheet.
Is XLTX to XLSX conversion secure?
Yes. Spreadsheets are transferred over an encrypted connection, processed securely, and automatically removed after conversion. No account is required.