Convert CSV to XLS
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You have the option to convert your csv file to xls, as well as a variety of other formats, using our free online converter.
Converting your csv file to xls is easy with these steps.
Converting your xls file to csv is easy with these steps.
Step 1
Upload csv-file
You can select csv file you want to convert from your computer, Google Drive, Dropbox or simply drag and drop it onto the page.
Step 2
Select «to xls»
Choose xls or any of the other 200+ supported formats you'd like to convert to.
Step 3
Download your xls file
Please wait for the conversion to complete, then click on the download button to obtain your converted file in the xls format.

Converting csv to xls
Simply drag and drop your csv files onto the webpage, and you'll be able to convert them to xls or over 250 different file formats, all without having to register, provide an email address, or include a watermark.
As soon as you upload your csv files, we instantly delete them. Converted files are then deleted after 24 hours. Furthermore, we ensure that all file transfers are secure through advanced SSL encryption.
You don't have to go through the hassle of installing any software. We handle all csv to xls conversions in the cloud, which means that none of your computer's resources will be used in the process.
Comma Separated Values File
Extension | .csv |
Category | 🔵 documents |
Programs | 🔵 Microsoft Excel 🔵 Microsoft Works 🔵 Corel Quattro Pro 🔵 Apache OpenOffice 🔵 LibreOffice 🔵 Microsoft Notepad 🔵 Libre Office 🔵 MobiSystems OfficeSuite Pro 7 |
Description | 🔵 CSV – is a unique text format. The data inside of which are separated by commas—developed in the early 70-ies of the XX century to import various table information and transfer bulk information between databases in text format. Each line of the file acts as one row of the database. Using the spreadsheet application, CSV files can be organized into cells and added to the appropriate database. Commas separate the parameters of each column. If there are reserved symbols (for example, a semicolon or a new line), double quotes play the separator role. This allows you to transfer information between different programs freely. CSV, in some cases, are сalled flat files. They can be opened by most editors able to work with tables and texts, including both authentic Excel and open source utilities like Apache Open Office and Libre Office. |
Technical details | 🔵 On personal computers, the CSV extension includes many values represented as ASCII tables. In this case, the text strings are clearly organized, so all values are separated by commas or double quotes (if there are reserved symbols). The use of different delimiters allows the availability of unequal encoding. |
Developer | 🔵 Microsoft |
MIME type | 🔵 text/comma-separated-values |
Microsoft Excel Binary File Format
Extension | .xls |
Category | 🔵 documents |
Programs | 🔵 Microsoft Office 🔵 LibreOffice 🔵 Kingsoft Office 🔵 Google Docs |
Main program | 🔵 Microsoft Office |
Description | 🔵 XLS – is a spreadsheet created by a popular Microsoft Excel application. It includes document data that is located in cells that have a specific address. They can contain formulas, mathematical equations associated with the information in other cells, and fixed information. It is often used for the development of graphs and charts. The format allows us to store and edit a broad range of parameters - images, tables, macros, types, diagrams. It has been widely used until the appearance of the 2007 version of Excel, and then it was replaced with the XMLSS extension. The information inside the XLS document is contained in a series of static-size streams. Their location is described using several segment distribution tables. It differs in backward compatibility and supports various file formats created for DOS. It is often used by web browsers to exclude the use of binary formats. The utility is included in the Microsoft Office suite and, in addition to Excel, can be opened by various applications like Apache Open Office, Libre Office, adapted to Mac OS, Windows, or Linux. |
Technical details | 🔵 The format's relevance is explained by its simplicity, although it does not support separate functions, for example, storing VBA macros. Until XMLSS appeared, the Excel application used the Biff extension when formatting, created based on the IFF container format. Due to this, changes to the book templates and their contents were available. After introducing the new format in 2007, the program has not lost the backward compatible properties, which guarantees the wide distribution of XLS in the future. Subsequently, the XLS extension was replaced by the XLSM, XLSB, and XLSX formats. |
Developer | 🔵 Microsoft |
MIME type | 🔵 application/vnd.ms-excel |
FAQ
❓ How do I change csv to xls?
To get started, either pick a file you want to convert from csv and select it or drag and drop it into the conversion tool. Next, select the desired format that you wish to convert your file to. Once you have selected the format, click the "convert" button and wait for the tool to finish converting your file.
⏳ What is the estimated time it will take to convert csv to xls?
Typically, image conversions only take a few seconds, so you can expect a speedy conversion when changing csv to xls.
🛡️ Can I trust OnlineConvertFree to convert csv to xls securely?
Absolutely! We take your security seriously, and guarantee the protection of your uploaded and converted files. No one will have access to your information since we delete all files once the conversion process is complete. You can trust that all types of conversions, including csv to xls, are 100% safe on OnlineConvertFree.
📱 Is it possible to convert csv to xls without having to install any software?
Yes, that's right! OnlineConvertFree doesn't require any installation, which means that you can convert any files, including csv to xls, on your computer or mobile device, completely online.