How to convert Xlsx to Xlt

Sheetize XLSX‑to‑XLT Converter for .NET provides a straightforward yet powerful API for turning fully‑populated XLSX workbooks into clean XLT templates. It preserves all styles, formulas, data‑validation rules, and named ranges while stripping cell values, so the resulting XLT can be reused across teams or processes.

Main Features

Convert XLSX → XLT

Generate an XLT template from any XLSX file with options to keep or remove specific sheets, preserve hidden rows/columns, and retain custom formats.

Selective Content Clearing

Choose to clear only cell values, or additionally reset comments, hyperlinks, and dynamic names while keeping structural elements intact.

Preserve Formatting & Formulas

All cell styling, conditional formatting, and formulas are kept unchanged, ensuring the template behaves exactly like the source workbook when new data is entered.

Streaming & Large‑File Support

Process workbooks in a streaming mode to avoid high memory usage, making it suitable for enterprise‑scale template generation.

Detailed Instructions

XLSX → XLT Workflow

To convert an XLSX file to an XLT template with Sheetize, follow these steps:

  1. Initialize the Converter: Create an instance of SpreadsheetConverter.
  2. Configure Options: Set SpreadsheetSaveOptions to define which sheets to keep, whether to clear only values or also comments, and the output path.
  3. Define File Paths: Provide the source XLSX path and the destination XLT file location.
  4. Execute Conversion: Call Process with the prepared load and save options.

Example – Convert XLSX to XLT, clearing only values

using Sheetize;

var loadOptions = new LoadOptions
{
InputFile = @\"D:\\Templates\\Report.xlsx"
};

var saveOptions = new SpreadsheetSaveOptions
{
OutputFile = @\"D:\\Templates\\ReportTemplate.xlt"
};

SpreadsheetConverter.Process(loadOptions, saveOptions);

Expanded Format Support

  • Sheetize can also convert XLT back to XLSX, enabling round‑trip editing of templates.
  • The library supports exporting to CSV, TSV, or JSON directly from a template for data‑driven report generation.
  • Combine XLSX‑to‑XLT conversion with the HTML ↔ XLSX utilities to create end‑to‑end pipelines like HTML → XLSX → XLT. With these capabilities, Sheetize makes XLSX‑to‑XLT conversion effortless, whether you need a quick one‑off script or a production‑grade service for generating reusable Excel templates.
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