Convert XLSX to XLS online and free

Step 2 - Convert your files to

Or choose a different format

Step 3 - Start converting

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I tried it and immediately fell in love! It was so easy to use! After a couple conversions I bought the guys a cup of coffee. A couple more and decided this was too good to abuse! I joined! My life is so much easier!


I had a huge, problematic file to convert that couldn't go through the usual automated conversion process. The Zamzar team responded quickly to my request for help, and they took the extra steps needed to do it manually.


Used it for over a year to convert my bank statements to csv files. Great quick app, increased my productivity a lot. Also, amazing support - always helped me quickly!

Agata Wierzbicka

I've used this product for years. And customer service is excellent. Just had an issue where I was charged and I didn't agree with the charge and they took care of it, even though they didn't have to.


I have been so thankful for Zamzar’s support from the beginning of the Pandemic to the present day. Their service is first rate & their helpfulness is always the best it could be.


A very useful and professional site. The service is easy to use and the administrators are helpful and courteous.

David Shelton

It’s my first time using it. I had some complications doing it. I’m not very good at this. But I wrote to the company and I had a lot of help. I’m satisfied with customer service and with the app.

Ana Suárez

Great for when you need a lot of conversions in a short time. You have directly access and can even put the subscription on for just a month.

Sabina Calis

Great thanks to you all for helping me to get the OLD files converted correctly. 20 years, quite a long time, reviewing the files brings much memory to me. That's the best gift I received last year. Thank you all again.

Jiunn-Ru Lai

I feel like Zamzar is an active team member, especially for projects that I work on where I am the workhorse and it saves so much time and frustration. I am spoiled with Zamzar, because they have set the bar for file conversion and customer service very high.

Deborah Herman

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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Your files are in safe hands

Zamzar has converted over 510 million files since 2006

For every 10,000 files converted on Zamzar, we'll plant a tree. By using Zamzar you are helping to make a difference to our planet

We're committed to regular charitable giving. Each month we donate at least 2% of our company profits to different charities

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!

Want to convert files straight from your desktop?

Get the App

Fully integrated into your desktop

Convert over 150 different file formats

Convert documents, videos, audio files in one click

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.

Zamzar converts files on all platforms. We support Windows, Mac, Linux and everything in between. All you need is a web browser.

Any Operating System

Zamzar converts files on all platforms. We support Windows, Mac, Linux and everything in between. All you need is a web browser.

Zamzar has been around since 2006, and in that time we have worked day and night to make sure your files get converted as quickly as they possibly can.

Fast Downloads

Zamzar has been around since 2006, and in that time we have worked day and night to make sure your files get converted as quickly as they possibly can.

If you run into a problem, just drop our support team an email and they’ll be more than happy to help.

Dedicated Support

If you run into a problem, just drop our support team an email and they’ll be more than happy to help.

Like our web application, our API supports 100s of different file formats, meaning over 1100 different conversions are supported.

API Available

Like our web application, our API supports 100s of different file formats, meaning over 1100 different conversions are supported.

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.

XLSX Document Format

XLSX Converter

XLSX is a Excel file type developed by Microsoft as part of Office 2007. XLSX was developed by Microsoft as part of their Office 2007 development which focused on trying to allow information to be more readily shared between different programs whilst also reducing the file size footprint which had been increasing year on year.

XLSX files have the same functionality as XLS files in that they can include shapes, charts, formula, macros and more. The difference between the two is more technical. The XLSX file data is stored in the Open XML format which stores data as separate files and is zipped to reduce space. This is compared to the XLS file type which stores the data in a single binary file. XLSX files can be opened by various programs including various OpenOffice programs and on the web with applications like Google Drive.

Related Tools

XLS Document Format

XLS Converter

The XLS format, also known as the Excel Binary File Format, is the format for spreadsheet files created by Microsoft or other spreadsheet programs. XLS files contain one or more worksheets that are made up of cells that are arranged by row and by column, and they allow users to do calculations by inserting formulas into cells. XLS files also support charts, images, pivot tables and more, and this means that they are often the format of choice for anyone doing any form of calculation or working with numerical data. This file format also allows users to create and record macros using a macro-programming language called Visual Basic.

XLS files are widely used in education and in work, although in 2007 they were replaced by the XLSX file format as the primary file type used for Excel spreadsheets.

Users can open XLS files with either Office for Windows or Office for Mac, and both these programs support features, including macros that have been written in Visual Basic. While applications like OpenOffice allow XLS files to be opened, some features may be limited. XLS files can also be opened on Android or iOS.

Related Tools

How to convert a XLSX to a XLS file?

  1. 1. Choose the XLSX file that you want to convert.
  2. 2. Select XLS as the the format you want to convert your XLSX file to.
  3. 3. Click "Convert" to convert your XLSX file.

Convert from XLSX

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


Convert to XLSX

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


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.

Yes, you can save XLSX as XLS. You can use Microsoft Excel itself or a conversion tool to achieve this. There are plenty of online conversion tools out there, but a safe and quick option is to use Zamzar’s online converter. Simply upload your file and select XLS as your ‘Convert To’ option. You’ll then be able to download your converted file from the same page.

To use Microsoft Excel instead, open your file with Excel, click on the ‘File’ tab, click ‘Save As’ and then choose Excel 97-2003 (XLS) as the format.

To change an Excel file from XLSX to XLS online, you’ll need to use an online converter. With over 1200 file formats to choose from, Zamzar is a versatile solution to converting your files. Just upload your file in Step 1, select XLS as your ‘Convert To’ option, then click to start the conversion process. Within minutes you should have your converted file ready to use!

They may look very similar as spreadsheets go, but XLS and XLSX aren’t the same. The main differences between the two are the file extension, size, performance, security and reliability. Although XLS is the format used for Excel 97-2003, these files can be opened in any version of Microsoft Excel. XLSX is a modernised version for Excel 2007 onward, but this file type can only be opened with newer versions of Excel. If you want to convert your XLSX file to XLS format, or vice versa, then the free conversion tool on Zamzar’s website makes it really easy.

You can convert XLSX to XLS in three quick steps using Zamzar’s online file converter. The conversion tool is web-based with a simple user-interface and converts files really quickly. Alternatively, if you have access to Microsoft Excel, you could use this to open your XLSX file and then save it as an XLS file.

If you have several files to convert, using Zamzar’s online tool will save you time compared to converting each file individually with Excel.

Depending on your needs, XLSX may be better for you than XLS. While XLS is usable in any version of Microsoft Excel, supports Macros, and works faster than XLSX, it does have limits to the amount of data it can store, and is less robust than the XLSX format. XLSX is widely compatible with non-Microsoft-based devices, but can only be opened on versions of Excel 2007 or later. It doesn’t support Macros, but it can save more data in smaller file sizes than XLS. If you need to convert your XLSX file to XLS format, you can easily do that with the free conversion tool on Zamzar’s website.