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File converter / Documents / XLSX

Online XLSX converter

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Choose file to convert to .xlsx
or drag and drop file

You can convert documents to XLSX format with free online converter.

How to convert to xlsx
Step 1

Upload file

Select file, which you want to convert from your computer, Google Drive, Dropbox or drag and drop it on the page
Step 2

Select «to xlsx»

Select xlsx or any other format, which you want to convert (more 200 supported formats)
Step 3

Download your xlsx file

Wait till your file will be converted and click download xlsx -file

Online and free xlsx converter

Fast and easy
Just drop your xlsx files on the page and you can convert it to more than 250 different file formats without registration, giving an email or watermark.
Don't worry about security.
We delete uploaded xlsx files instantly and converted files after 24 hours. All files transfer with secured an advanced level of SSL encryption.
All in the cloud
You don't need to install any software. All xlsx conversions make in the cloud and don't use any resources of your computer.
Office Open XML Document
File extension .xlsx
File category documents
Description XLSX – is an e-book created with one of the versions of the Excel program older than 2007. Thus the data have the form of tables consisting of columns and lines. Each table is divided into cells with a unique address, consisting of numeric and alphabetic characters. Cells contain data, both manually entered, and information that was obtained as a result of calculations. The extension allows the use of images, diagrams, and graphic information. XLSX files are formatted based on the Open XML standard, which will enable you to compress data by the type of ZIP. The archive contains a file for describing the table and individual files for each of its worksheets. The format makes it possible to develop and edit complex multi-sheet spreadsheets with various formulas and data sources.
Technical details Using the XLSX extension helps to optimize the file's content, the technology of managing, and restoring information. The format significantly increases the capabilities of binary files of obsolete Excel program variants. All applications that display XML can work correctly with the XLSX extension. Due to the preservation of data in XML format, reliable data storage is provided. This allows you to transfer files over local networks seamlessly.
Programs
Microsoft Office
LibreOffice
Kingsoft Office
Google Docs
Main program Microsoft Office
Developer Microsoft
MIME type
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet

FAQ

❓ How can I convert xlsx?
Firstly, select a xlsx file you want to convert or drag and drop it. Secondly, select a format you want to convert your file to. Then click convert and wait until your file is converted
⏳ How long should I wait to convert xlsx?
Documents conversion usually takes a few seconds. You will convert xlsx very quickly.
🛡️ Is it secure to convert xlsx on OnlineConvertFree?
Sure! We delete your uploaded and converted files, so nobody has access to your information. All types of conversion on OnlineConvertFree (including xlsx) is 100% safe.
📱 Can I convert xlsx without software installation?
Absolutely! OnlineConvertFree doesn’t require installation. You can convert any files (including xlsx) online on your computer or mobile.