XLT to XLTM Converter
Convert XLT to XLTM online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
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Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is an XLT file?
The XLT format is a legacy spreadsheet template file used by Microsoft Excel versions 97 through 2003. It utilizes the proprietary Binary Interchange File Format (BIFF8), storing formatting, formulas, and baseline data in a binary stream rather than the XML structure of modern formats. These templates serve as blueprints for generating new .XLS workbooks with consistent layouts, preventing the overwriting of the original template file upon saving.
How to open an XLT file
Modern versions of Microsoft Excel retain backward compatibility for XLT files, automatically converting them to the newer XLTX or XLTM format upon saving. Third-party applications such as LibreOffice Calc and Kingsoft Spreadsheets can render XLT templates, though complex formatting or legacy macros may require adjustment. Google Sheets supports importing XLT files, converting them to the native Google Sheets format.
XLT Technical Info
- Full Name
- Excel Binary Template
- Developed By
- Microsoft
- Initial Release
- 1997
- MIME Type
- application/vnd.ms-excel
What is an XLTM file?
The XLTM file is a macro-enabled template format introduced with Microsoft Office 2007, based on the Office Open XML (OOXML) architecture. It combines the templating functionality of XLTX with the ability to store Visual Basic for Applications (VBA) macros (contained in a vbaProject.bin part within the ZIP container). This format allows organizations to deploy standardized spreadsheets that include automation scripts, while preventing users from modifying the base template file.
How to open an XLTM file
Microsoft Excel is the primary application for creating and executing XLTM files with full VBA support. While LibreOffice Calc and OpenOffice can open XLTM templates, they may not execute proprietary VBA macros correctly. Mobile versions of Office and web-based viewers typically allow viewing the template structure but disable macro execution for security reasons.
XLTM Technical Info
- Full Name
- Excel Macro-Enabled Template
- Developed By
- Microsoft
- Initial Release
- 2007
- MIME Type
- application/vnd.ms-excel.template.macroEnabled.12
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The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
Convert XLT to XLTM in seconds
Every XLT to XLTM conversion runs on our servers, so your device stays fast and the output quality stays intact.
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No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
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Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.
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Developer API
Convert XLT to XLTM via API
Automate XLT to XLTM conversions in three steps: create a job, upload your file, then poll for the result.
# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tag": "xlt-to-xltm",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "xltm"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.xlt
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
-H "Authorization: Bearer YOUR_API_KEY"Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.