XLSX Converter
Convert XLSX files to and from other formats right in your browser. Free, private and with no upload.
Drag and drop your files here
or click to browse local files (large files supported, limited only by browser RAM)
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What is a XLSX file?
.xlsx (Excel Workbook) is the default Microsoft Excel workbook format since Office 2007, based on Office Open XML.
Also recognized with the extensions .xlsm.
| Feature | XLSX (Excel Workbook) |
|---|---|
| Multiple sheets | Yes |
| Formulas and formatting | Yes |
| Best for | everyday spreadsheets shared with Excel users |
| Opens in | Excel, Google Sheets, LibreOffice and Numbers |
XLSX is a spreadsheet format.
Convert XLSX to other formats (7)
Convert other formats to XLSX (8)
Why convert here
- Your files never leave your device: conversion runs locally with WebAssembly.
- No sign-up, no watermark and no file size limit beyond your browser's memory.
- Batch conversion with parallel workers, plus quality, size and codec settings.
Looking for something else? Browse the full converter directory.