Convert CSV to XLS online and free

Step 2 - Convert your files to

Or choose a different format

Step 3 - Start converting

(And agree to our Terms)

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.

Philips logo BBC logo Amazon logo Netflix logo Harvard logo Microsoft logo Discovery logo Shell logo Colombia logo Siemens logo Sky logo Princeton logo

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.

In just three simple steps you can convert your file, and you can do so without ever leaving your browser.

Ease of Use

In just three simple steps you can convert your file, and you can do so without ever leaving your browser.


Fast Downloads

We've recently developed real-time conversions, which means you never have to leave our site to convert and download your file.

We know thatads can distract you from converting your files, which is why we decided to run an ad-free service.


We know thatads can distract you from converting your files, which is why we decided to run an ad-free service.

New conversion types get added to our site regularly. We now support over 1100 file-conversion types!

New Conversion Types

New conversion types get added to our site regularly. We now support over 1100 file-conversion types!

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.

CSV Document Format

CSV Converter

CSV is a type of file for saving spreadsheet data which is recognised by almost all spreadsheet programs. CSV stands for ‘comma separated values’, and if you open a CSV file outside a spreadsheet program, you will see plain text with the data separated, usually by commas, semi-colons, or quotation marks. If you open that same CSV file in a spreadsheet program like Microsoft Excel, Apple Numbers, Google Sheets or LibreOffice Calc, each separated piece of data should then be transferred into an individual cell.

Because CSV files are recognised by almost all spreadsheet programs, they are used as a simple way to export data or transfer it between different programs. However, CSV is a plain text format, so CSV files cannot include advanced spreadsheet functions like charts, formulas, filters, or formatting. There is also not currently a universal open standard for all CSV files.

Related Tools

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.

Related Tools

How to convert a CSV to a XLS file?

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

Convert from CSV

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


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.

You can convert CSV to XLS using Microsoft Excel or a specific conversion tool such as Zamzar. To use Microsoft Excel, open your CSV file within the application and then click to save this as an XLS file on your computer. If you don't have access to Microsoft Excel, then you can easily convert your file with Zamzar’s web-based conversion tool. Simply upload your file to the converter, choose ‘XLS’ as your format to convert the file to, and then click ‘Convert Now’. Once the conversion is complete you can download the new file straight to your device.

You can open a CSV file in Excel fairly easily. Open Microsoft Excel, click the ‘File’ tab from the top menu bar, click ‘Open’ and then select your CSV file from the relevant folder on your computer. The CSV file will then open in Excel. If you are having problems opening your CSV file in Microsoft Excel, you could use an online converter like Zamzar to first convert the file to XLS format, and then open the XLS file in Excel.

You can convert CSV to Excel for free using a web-based conversion tool such as Zamzar, or using Microsoft Excel itself if you already have that installed. To use Zamzar, visit our homepage and follow the simple three-step conversion process to convert your file to XLS or XLSX for Excel. Once your conversion is complete, you can download your converted Excel file from the same page or, if you provided your email address at step 3, you can click the link sent via email to access your file.
If you already have Microsoft Excel installed, then you can use this to open your CSV file instead, and then resave it as an XLS file.

To convert your CSV file to Excel without opening it you would need to use a conversion tool. Zamzar is an online conversion tool that’s free and quick to use. With the three-step process, you can upload your file, select the option you’d like to convert your file to, and download your convertedl file, all from the same page. To convert to Excel, simply select XLS or XLSX as the format to convert to.

The fastest way to convert CSV to Excel is to use a conversion tool. There are many conversion tools on the market but one of the easiest and most accessible tools is Zamzar. With over 1200 file formats supported, excellent customer service support, and a free and easy three-step conversion process, your new Excel file can be saved to your device within seconds.

Alternatively, if you just have one file to convert, then you could open the CSV file with Microsoft Excel, and then save it as an XLS or XLSX file.