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Convert your XLSX files online—no registration needed. No matter your platform—Windows, Linux, or macOS—you can convert your XLSX documents rapidly. Drag and drop your file onto the upload form, pick the output format you need, and hit the convert button. After the conversion is finished, download your AZW3 file instantly.
Conversion time varies based on the XLSX file's size and complexity, but most files convert within seconds. Our advanced options include converting secured documents and delivering conversion results straight to your inbox.
Easily convert your XLSX documents from any location and any device, even on mobile. This conversion app is always accessible online and free for basic use.
Check our videoXLSX is a widely used file format for spreadsheets, developed by Microsoft as part of the Office Open XML standard, succeeding the older XLS format. It is supported by Microsoft Excel, Google Sheets, LibreOffice Calc, and other spreadsheet applications, ensuring cross-platform compatibility. The format is based on XML and stored in a compressed ZIP container, enabling features like advanced formulas, charts, conditional formatting, and support for large datasets while maintaining smaller file sizes compared to its predecessor.
AZW3 is an e-book file format developed by Amazon for use on Kindle devices and apps. It is supported by Kindle devices, the Kindle app, and tools like Calibre for conversion and management. The format is based on the MOBI structure but includes advanced features like enhanced typography, embedded fonts, and support for HTML5 and CSS3 for richer formatting and interactivity.
You can also convert XLSX into many other file formats. Please see the complete list below.