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Use the XLS to XLSX Online Converter or get a batch app for quick use!


CONVERT XLS to XLSX ONLINE

1) Upload XLS file to convert

 

Drop files here, or Click to select
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Allowed file types: excel, ris, bib, ods, xls, xlsx, xlsm, csv, tsv, tab, xlsb, xltx, xlr, pxl, qpw, wb3, wq1, dbf, wk3, 123, mdb, sav, evtx, gnu, pages, numbers, sqlite

2) Set converting XLS to XLSX options

Convert to

 

Options

Header:
Footer:

3) Get converted file

DOWNLOAD CONVERTED FILE
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Get Total Excel Converter to convert XLS, XLSX, ODT, XLSM, etc. safely.

Excel Converter To Convert Spreadsheets
  • Convert Excel Files in Batch!;
  • Convert XLS to XLSX and in many other formats
  • Convert hundreds of spreadsheets in 3 clicks;
  • Both MS Office and OpenOffice files;
  • Have a desktop converter that works without Internet;
  • Keep your files safe, don't send them to the web;
  • Get more accurate results with the more poweful engine.
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close Total Excel Converter
okTotal Excel Converter supports almost all Excel extensions: XLS, XLSX, XLSM, XLSB, XLT, XLTM, XLTX, XLK, XLW. When the new Office is released, we will add new file types too.
okWith Total Excel Converter you can convert Excel to PDF and add a digital signature in one go.
okTotal Excel Converter can convert each page of your spreadsheet into a separate file.
okTell Total Excel Converter to copy original time stamps if you don't want to change the date.
okHave an outdated Microsoft Office 2003? Update all your old files to the new format in one go. Convert XLS files to XLSX in batches.
okTotal Excel Converter will help you to convert Excel 2003 XML Files (rare option!)
okTotal Excel Converter has a built-in renamer to give your files new descriptive names. Include a counter, a date or worksheet name into the file name and your files will be in perfect order.
okConvert Excel spread sheets via our most straightforward interface.
okThe widest list of output file types: DOC, PDF, HTML, MHT, XHTML, CSV, TXT, TIFF, JPEG, SVG, RTF, XML, XLS, XLSX, ODS, ODT, Lotus, DIFF, SYLK, LATEX, SQL, DBF, Access!
okTotal Excel Converter can combine several Excel spread sheets into one TIFF or PDF file.
okWant to quickly find a file? Total Excel Converter helps you to preview any document you select.
okAdd your logo or any other image to the header or the footer of the output file.
okWant more order? Add page counters or a date to every page of the output files. Sequential numbering of several folders is avaialble.
okTotal Excel Converter can copy original time stamps if you want to keep them.
okWhen you convert Excel to PDF you can set user permissions, password-protect your files or sign with a digital signature. Get PDF, PDF/A and non-searchable PDFs.
okTotal Excel Converter can be run via command line (get the ready-to-use command line from GUI).

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Cloud Based
There is no need to install any software to convert XLS to XLSX with CoolUtils. Simply access the internet, and you can easily convert your file online with our service.
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Secure
Our hardware operates in top-tier, highly secure data centers equipped with advanced electronic surveillance and multi-factor access control systems.
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Ease of Use
Converting from XLS to XLSX has never been so simple. Our intuitive interface lets you convert files in just a few clicks.
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Privacy
We understand the importance of privacy, which is why we've developed a comprehensive privacy policy detailing how we handle your files and personal information. You can read the policy here.

 

XLS File

File extension .XLS
CategoryDocument File
DescriptionXLS is the most popular format for storing table data. It is native Microsoft Excel format with data stored in numbered cells that form columns and rows. The top line and left column of each table contains numbering of each cell that can contain either static or dynamic data that is calculated from formulas. XLS features powerful calculation and charts-building options, as well as rich text formatting. XLS is compatible with numerous table editors such as Calc, PlanMaker, OpenOffice, etc.
Associated programsMicrosoft Excel
Microsoft Excel Viewer
OpenOffice
Developed byMicrosoft
MIME typeapplication/vnd.ms-excel
Useful linksMore detailed information on XLS files
Conversion typeXLS to XLSX

XLSX File

File extension .XLSX, .EXCEL
CategoryDocument File
DescriptionXLSX is a format from Office Open XML family, a native MS Excel file type starting from version 2007. As opposite to XLS, this format uses ZIP compression that makes XLSX files smaller in size. Actually XLSX file is an archive of XML-documents. The cells in XLSX table can contain plain text, formulas or graphic elements. XLSX can be read in MS Office 2007 and later, Universal Viewer, OpenOffice, MS Office Excel Viewer, Corel WordPerfect Office. This format doesn’t support macros.
Associated programsMicrosoft Excel 2007
OpenOffice
OxygenOffice Progessional (Linux)
Developed byMicrosoft
MIME type
Useful linksMore detailed information on XLSX files
Rating XLS to XLSX   5 star XLS to XLSX   4.9 (1731 votes)
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Convert XLS to XLSX with Ease

Our online conversion tool provides a seamless experience for transforming your Excel files from XLS to XLSX format. As technology evolves, the need to streamline data management and enhance compatibility across devices becomes paramount. This tool is designed to meet those needs by effectively converting older Excel files into the modern, more versatile XLSX format.

The benefits of converting to XLSX are numerous. The XLSX format, introduced by Microsoft with Excel 2007, offers greater efficiency in file storage and data processing. It supports a wider range of features, including enhanced data recovery options, improved data integrity, and greater compatibility with contemporary software, making it the preferred choice for businesses and individuals alike.

Our conversion tool operates online, eliminating the need for software installation. Simply upload your XLS file, and the conversion process will be executed swiftly, preserving the original formatting and data content. This ensures that the transition to XLSX retains the accuracy and functionality of your spreadsheets.

What sets our tool apart is its focus on user convenience and data security. We prioritize user privacy by using secure file transfer protocols and ensuring that your files are automatically deleted from our servers after conversion. Additionally, our intuitive interface simplifies the process, making it accessible even to users with limited technical expertise.

Whether you are working on individual projects or managing large data sets, this conversion tool provides a reliable solution for modernizing your Excel files. Experience the efficiency and adaptability of XLSX with our straightforward online tool.

 

How to convert XLS to XLSX?

  1. Upload Your File: Go to the site, click on «Upload File,» and select your XLS file.
  2. Set Conversion Options: Choose XLSX as the output format and adjust any additional options if needed.
  3. Convert and Download: Click «Download Converted File» to get your XLSX file.

Convert from XLS

Using CoolUtils, it is possible to convert XLS files to a variety of other formats:

Convert to XLSX

Using CoolUtils, it is possible to convert a variety of other formats to XLSX files:

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