XLS to XLSX Converter

Convert legacy XLS files to modern XLSX format online for free

Convert XLS to XLSX

Idosiye

cyangwa Kanda Kuri Guhitamo Idosiye

Supported formats: XLS • No file size limit

100% Kigenga: Convert unlimited XLS files to XLSX!

XLS to XLSX Converter – Free Online Tool

In today's data-driven world, file formats matter. Our free XLS to XLSX Converter is designed to help you quickly transform files with just a few clicks. Whether you're a developer handling APIs, a student working on a project, or a business professional preparing data, this tool makes conversion effortless.

What is XLS Format?

XLS is the legacy Excel file format used by Microsoft Excel 97-2003. It's a binary format that stores spreadsheet data including formulas, charts, and formatting. While widely supported, it has size and feature limitations compared to modern formats.

What is XLSX Format?

XLSX is the modern Excel file format introduced in Excel 2007. It uses Open XML standard, offers better compression, larger file size support, improved data recovery, and enhanced security features. It's the current standard for spreadsheet files.

Why Convert XLS to XLSX?

There are many reasons why people need this conversion. From simplifying analytics to improving application compatibility, converting with our tool ensures accuracy, reliability, and speed. XLSX offers better performance, security, and compatibility with modern applications.

Intambwe ku Ntambwe

  1. Upload your XLS file to our converter.
  2. Click the guhindura button.
  3. Download your ready-to-use XLSX file instantly.

Ubu buryo bwihuse, butekanye kandi ntibukeneye ubuhanga bwa tekiniki.

Features of Our XLS to XLSX Converter

  • ✅ Kuri Gukoresha Na: Bitagira imipaka Amahinduka
  • Gutunganya ✅ byihuse hamwe nibisubizo byihuse.
  • ✅ Bya Idosiye Na: Ikiyega - Gusiba Nyuma Ihindurangero.
  • Ikora ✅ ku bikoresho byose birimo PC, Mac, Android na iOS.
  • ✅ Nta software ya USU ikenewe – ishami ryuzuye rya software ya USU.
  • ✅ Guhinduranya ibintu mu buryo bwizewe kandi buri gihe.

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  • Mukoraporogaramu Modernize legacy Excel files for APIs or applications.
  • Students: Update old spreadsheets for compatibility with current software.
  • Ubucuruzi: Migrate historical data to modern Excel format.
  • < Uburemere UTSINDAGIYE Ensure compatibility with latest analysis tools.

Ibibazo bizwa kenshi

Oya rwose nta kiguzi cyihishe inyuma.

No, this is a 100% online tool.

Yes, our tool preserves structure and data integrity.

Umwanzuro

Our XLS to XLSX Converter is the simplest, safest, and most efficient way to handle file conversions online. Stop wasting time with complex manual processes – try it now, upload your file, and get your converted version instantly!