What is the difference between xls and xlsx

The difference between xls and xlsx: 1. File structure, xls is an early binary file format of Excel, while xlsx uses an XML-based file structure to store data; 2. File size, xls files are larger, and xlsx is based on XML, so the file is smaller; 3. Compatibility, xlsx is more compatible with other programs and versions than xls; 4. Function, xls has some limitations in functionality, while xlsx provides more functions and flexibility ; 5. Security, xls may have security risks, but xlsx does not.

xls and xlsx are two formats for spreadsheet files, which are common file extensions for Microsoft Excel. Although they are both used to store and process data, there are some major differences between xls and xlsx. The following is a detailed explanation of the difference between xls and xlsx.

File structure:

xls file format is an early binary file format of Excel, which uses a binary-based file structure to store data. This format is used in Excel 2003 and previous versions. In comparison, the xlsx file format is a new generation of XML file format for Excel, which uses an XML-based file structure to store data. This format first appeared in Excel 2007 version.

File size:

Since the xls file format is binary, its file size is larger. This is because binary files require more bytes to represent the same amount of data. In contrast, the xlsx file format is based on XML, which uses markup notation to represent data. This compression format can make the file size smaller and save disk space better than the xls format.

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Compatibility:

xls format is an earlier version of Excel The standard format used. Although it is one of Excel's widely used formats, it has some limitations in terms of compatibility with other spreadsheet programs and versions. Unlike this, xlsx is the standard format used by newer versions of Excel. Since it is based on XML, it is more easily compatible with other programs and versions.

Function:

The xls file format has some limitations in functionality. It may not support some advanced features of Excel, such as conditional formatting and macros, etc. The xlsx file format provides more functionality and flexibility. It supports all Excel features and can be used as an ideal format for creating complex spreadsheets and data models.

Security:

Since the xls file format is binary, it may have security risks, such as it may contain macro viruses. In contrast, the xlsx file format is based on XML and is not susceptible to potential security threats.

Summary:

In general, xls and xlsx are two different file formats in Excel. XLS is an older binary format that has some limitations in file size, compatibility, and functionality. xlsx is a new XML-based file format with smaller file size, wider compatibility, and more features. Therefore, for the creation and processing of Excel files, it is better to give priority to using the xlsx format.

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