Spreadsheet Conversion
Convert XLTX to XLSX Online — Free
Fast, free XLTX to XLSX converter. No registration required.
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How to Convert
1
Upload your .xltx file by dragging it into the upload area or clicking to browse.
2
Choose your output settings. The default settings work great for most files.
3
Click Convert and download your .xlsx file when it's ready.
What is XLTX?
XLTX is the standard Microsoft Excel template format in Office Open XML. It stores cell formatting, conditional rules, charts, and formulas as reusable templates without macros.
Format Details
- Full Name
- Excel Template
- Extension
- .xltx
Key Features
- OOXML format
- Excel template
- No macros
- Standardized
What is XLSX?
XLSX is the modern Microsoft Excel format. It's the standard for spreadsheets containing data, formulas, charts, and pivot tables.
Format Details
- Full Name
- Microsoft Excel Spreadsheet
- Extension
- .xlsx
Key Features
- Spreadsheet
- Formulas
- Charts
- Data analysis
XLTX vs XLSX
| Feature | XLTX | XLSX |
|---|---|---|
| Full Name | Excel Template | Microsoft Excel Spreadsheet |
| Extension | .xltx | .xlsx |
| Best For | OOXML format | Spreadsheet |
Frequently Asked Questions
Yes. You can convert up to 5 files per day without signup, or 20 per day with a free account — no watermark required. Pro users get 100 conversions per day and larger file sizes.
Most files convert in under 30 seconds. Larger files may take 1-3 minutes. Processing runs on our servers, so your device stays fast.
Our converter uses optimized settings to preserve quality. Default settings prioritize quality over file size. You can adjust settings for more control.
Free users can convert files up to 500MB. Pro users can convert files up to 2GB with priority processing.
Yes. Our converter is browser-based and works on any device — iPhone, Android, tablet, or desktop. No app or software installation needed.