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XLS → XLSX · free · no account needed

XLS to XLSX converter

Convert XLS (Legacy Excel Spreadsheet) files to XLSX (Microsoft Excel Spreadsheet) format. Free guest conversions — no signup required.

deleted after 24h 25 free min/day 1.25 GB max file size

Drag & drop files here

or click to browse from your computer

No account required · View pricing for higher limits

how it works

How to convert XLS to XLSX

01

Upload your file

Drag and drop or browse to select. Multiple files supported.

02

Convert instantly

Click convert — your file is processed securely on our servers.

03

Download the result

Get your converted file immediately. Deleted from servers in 24h.

about these formats

XLS vs XLSX

XLS

What is a XLS file?

XLS is the older Excel format used before 2007. Converting XLS to PDF or XLSX ensures compatibility with modern spreadsheet software.

XLSX

What is a XLSX file?

XLSX is the modern Excel spreadsheet format. It supports formulas, charts, and multiple sheets. Converting XLSX to PDF creates a non-editable snapshot for sharing.

Why convert XLS to XLSX?

  • Convert XLS files to XLSX for better compatibility with your devices and software
  • No software installation required — everything runs in your browser
  • Free daily conversions with no account, no ads, and no watermarks
  • Files are automatically deleted from our servers within 24 hours

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