XLS → XLSX

Convert Excel to Excel

Convert Excel (XLS) to Excel (XLSX) online for free. Fast, secure, no sign-up required. Files are automatically deleted after conversion.

Convert multiple files at once

Conversion Guidelines

File Requirements

  • Maximum file size: 50MB per file
  • Accepted format: XLS
  • Output format: .XLSX

Features

  • Batch processing available
  • Automatic download when done

Security

  • Files deleted automatically after conversion
  • HTTPS + encrypted file handling

Fast & Free

Convert XLS to XLSX in seconds with zero setup or sign-up.

Private by Design

Your files are transferred over HTTPS and auto-deleted from our servers after conversion.

No Watermarks

Get clean, high-quality output with no branding applied to your converted file.

Simple Steps

How to Convert Excel to Excel

Three simple steps – no software installs, no accounts.

1

Upload your XLS file

Select the XLS file you want to convert. Drag and drop is supported, and you can toggle batch mode for multiple files.

2

Confirm conversion

We'll convert your XLS into a clean XLSX file – no extra configuration needed.

3

Download your XLSX

Click "Convert" and your XLSX file will download to your device automatically.

Why use our Excel to Excel converter?

  • Preserve rows, columns, and formulas
  • Editable output in Excel / Sheets
  • Batch conversion supported
  • 100% free – no sign-up, no watermarks, no limits on the number of conversions.
  • Works on any device – desktop, tablet, or phone. No installations required.
FAQ

Excel to Excel FAQ

Everything you need to know about converting XLS to XLSX.

Upload your XLS file using the uploader on this page, click "Convert Now", and your XLSX file will download automatically. No sign-up required.

Yes. Our Excel to Excel converter is completely free to use. There are no sign-ups, no watermarks, and no hidden fees.

Yes. Your file is transferred securely over HTTPS and automatically deleted from our servers after conversion. We never share or store your data.

You can convert files up to 50MB per conversion. For larger files, please split them before converting.

Yes. Toggle the "Batch Conversion" switch in the uploader to convert multiple XLS files to XLSX in one go.