XLS to XLSX
Convert XLS to XLSX online and free
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Trusted by employees at these brands
Employees of some of the world's most well-known brands rely on Zamzar to convert their files safely and efficiently, ensuring they have the formats they need for the job at hand. From global corporations and media companies, to respected educational establishments and newspaper publications, employees of these organisations trust Zamzar to provide the accurate and reliable conversion service they need.
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From your personal desktop to your business files, we've got you covered
We offer a range of tools, to help you convert your files in the most convenient way for you. As well as our online file conversion service, we also offer a desktop app for file conversions straight from your desktop, and an API for automated file conversions for developers. Which tool you use is up to you!
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Convert over 150 different file formats
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Need conversion functionality within your application?Explore the API
One simple API to convert files
100s of formats for you to choose from
Documents, videos, audios, images & more...
Why choose Zamzar?
With Zamzar, file conversions are easy, reliable and convenient, so you can quickly convert your documents, images, videos, and more, to the formats you need. With faster downloads of converted files, and friendly and helpful support when you need it, you'll have everything you need to work with your files.
Multiple File Formats
We support almost every type of file format; if we don’t support one you need to convert, then drop us an email and we'll look to get it added.
At Zamzar, we want you to have the best possible experience when converting your files, which is why we are completely ad-free.
If you need a file converted quickly and securely, then you can rely on Zamzar to do just that.
We know how important it is for you to be able convert your file at any time, which is why we are available every minute of every day, all year round.
Tools to suit your file conversion needs
You'll find all the conversion and compression tools you need, all in one place, at Zamzar. With over 1100 file-conversion types supported, whether you need to convert videos, audio, documents or images, you'll easily find what you need and soon have your files in the formats and sizing that work for you.
XLS Document Format XLS Converter
The XLS file format was developed by Microsoft for its Excel spreadsheet program. XLS is a binary spreadsheet format that can include cell data and formulas, as well as charts and macros. Excel is one of the most popular software programs for recording, organising, calculating and analysing data. It’s often used for budgeting and reporting.
Microsoft introduced the new XLSX format for Excel in 2007, to replace XLS. However, you can still open XLS files in newer versions of Excel, as well as saving XLSX files into this older format. Excel is part of Microsoft’s Office suite, which is available as a one-off software purchase or an Office 365 subscription. Other spreadsheet programs that can usually open XLS files include Google Sheets, Apple Numbers and LibreOffice Calc.
XLSX Document Format XLSX Converter
XLSX is a file type created using Microsoft Excel - part of the Microsoft Office Suite software. This file format is a zipped Open XML-based file type, meaning it compresses or reduces the file size so that it can access stored data faster and be easily shared with other programs. XLSX was developed by Microsoft as part of their Office 2007 development and is now the default file format for Excel.
XLSX files are very similar in their functionality to their predecessor, XLS; they can be used to create spreadsheets, charts and graphs, process mathematical formulae, and to share or analyse data. The main difference between XLSX and XLS is in how the data is stored. Whereas XLS files hold data in a single file, XLSX saves data in the Open XML format, with separate files zipped up together to reduce space. This also means that XLSX files can present larger data sets and have a greater range of cells. As well as with Microsoft Excel, XLSX files can be opened using various other programs, including Google Sheets, LibreOffice, and Apple Numbers.
How to convert a XLS to a XLSX file?
- 1. Choose the XLS file that you want to convert.
- 2. Select XLSX as the the format you want to convert your XLS file to.
Convert from XLSXLS to BMP XLS to CSV XLS to GIF XLS to HTML XLS to HTML4 XLS to HTML5 XLS to JPG XLS to MDB XLS to NUMBERS XLS to NUMBERS09 XLS to ODS XLS to PDF XLS to PNG XLS to RTF XLS to TIFF XLS to TXT XLS to XLSX XLS to XML
Frequently asked questions
If you’ve got any questions about converting or compressing files with Zamzar, we’re happy to help! We’ve answered a few commonly-asked questions below, to get you started, and you can find out more information about file conversion and compression with Zamzar, in our Help centre.
XLS and XLSX are both Excel files, but XLSX is newer. It was introduced for Office 2007 and is now the standard. Zamzar is a quick way of converting XLS files into XLSX – just upload, convert, and download.
If you have Excel 2007 or later, you can open XLS files and save them into XLSX format. You may also be able to rename the file extension to .xlsx in File Explorer –make a copy first, just in case. However, Zamzar may be quicker if you don’t have Microsoft Office or don’t want to have to open or rename individual files.
XLS is an earlier version of XLSX, and XLS files can be opened in all versions of Office and can support macros. However, XLSX has been the standard Microsoft format since 2007, is more robust and tends to have a smaller file size – so if you don’t need support for macros then it may be the better choice.
It’s easy to convert between both formats by using an online conversion tool like Zamzar. Just upload one or more Excel spreadsheets, select to convert to either XLSX or XLS, and then download your new copy of the file.
One of the quickest ways to change an Excel file type without opening the file is to use an online conversion tool like Zamzar. Simply upload an XLS or XLSX file, and then convert it to the format you need, before downloading your new file.
Another way is to find the document in File Explorer and rename the file extension to .xlsx or .xls. However, it’s best to make a copy first before trying this method in case it affects the data in the file.
If you want to change an individual Excel file from XLS to XLSX, you can do this by opening the document in Excel and then saving it as an XLSX file. If you have more files to change, you may find it easier to use Zamzar or another online conversion tool. The tool on Zamzar’s website just has three steps – upload, convert and download. You don’t need to install extra software and you can convert multiple Excel files at the same time.
One of the quickest ways to change a workbook to XLSX is to use an online tool like the one on Zamzar’s website. You can convert multiple workbooks from older versions of Excel to XLSX in real time, without opening any files. Simply upload your XLS workbooks, select to convert them to XLSX, and then download the new files.
If you just have one file to change and you have Excel on your device, another method is to open an XLS workbook with Excel, and then use the ‘Save As’ menu option to convert it to XLSX.