Convert XLSX to XLS
Choose file to convert
You can effortlessly convert your xlsx file to xls, along with a multitude of other formats, using our complimentary online converter.
How to convert xlsx to xls?
Step 1
Upload an xlsx-file
You can select the xlsx file you wish to convert from your computer, Google Drive, Dropbox or just drag and drop it onto the page.
Step 2
Select "to xls"
Choose xls or any other of the 200+ supported formats that you wish to convert to.
Step 3
Download your xls file
Please wait for the conversion to be completed, then click on the download button to get your converted file in the xls format.
The security of your files is our priority
Recognizing the crucial significance of our users' data security, we have put a number of measures in place to guarantee reliable file conversion without the jeopardy of information leakage or privacy infringements.
Data Encryption
Every piece of information uploaded to our platform undergoes SSL encryption, safeguarding privacy during the transmission process.
Secure Storage
Upon completion of the conversion, the files are retained on secure servers for a duration of 24 hours and are then automatically obliterated, preventing any third-party access.
Safe Scripting
We regularly screen our file conversion tools for any malicious code or vulnerabilities, mitigating the risk of potential cyber threats.
Best tool to convert xlsx to xls
Converting xlsx to xls is fast and easy
Just drag and drop your xlsx files onto the webpage, and you'll have the capability to convert them to xls or over 250 different file formats, all without the need to register, provide an email address, or include a watermark.
Safe xlsx to xls Conversion
Immediately upon uploading your xlsx files, we delete them without delay. Converted files are then removed after 24 hours. Additionally, we ensure that all file transfers are secure through advanced SSL encryption.
No Software Installation Required
There's no need to go through the inconvenience of installing any software. We conveniently handle all xlsx to xls conversions in the cloud, which implies that none of your computer's resources will be consumed in the process.
Office Open XML Document
| Extension | .xlsx |
| Category | 🔵 documents |
| Programs | 🔵 Microsoft Office 🔵 LibreOffice 🔵 Kingsoft Office 🔵 Google Docs |
| Main program | 🔵 Microsoft Office |
| Description | 🔵 The .xlsx format came out with Excel 2007 as part of the Office Open XML (OOXML) standard and is way better than the old .xls format. It uses XML inside a ZIP file, which makes it simpler to read data and arrange stuff like worksheets. This format can handle a lot of data – over a million rows and 16,384 columns in each sheet, so it’s great for big sets of data. It also has cool things like formulas, charts, pivot tables, and VBA macros. Since it uses XML files, the file sizes stay pretty small. |
| Technical details | 🔵 The .xlsx format works well on different systems, has security stuff like digital signatures and encryption, and even a version (.xlsm) that supports macros for creating detailed documents. Since Excel 2007, the format .xlsx has become the standard for spreadsheets in Microsoft Excel. It is based on Office Open XML and uses XML and ZIP to reduce the file size. Files.xlsx allows you to create complex tables with data, formulas, graphs, and any design. You can even make pivot tables. It's got better security and works faster than .xls, so lots of people use it for business, school, and keeping their personal data straight. |
| Developer | 🔵 Microsoft |
| MIME type | 🔵 application/vnd.openxmlformats-officedocument.spreadsheetml.sheet |
Microsoft Excel Binary File Format
| Extension | .xls |
| Category | 🔵 documents |
| Programs | 🔵 Microsoft Office 🔵 LibreOffice 🔵 Kingsoft Office 🔵 Google Docs |
| Main program | 🔵 Microsoft Office |
| Description | 🔵 The .xls format is synonymous with spreadsheets created in Microsoft Excel, especially in versions prior to 2007. This binary file format has the capability to store data in cells that are systematically arranged in rows and columns. It's also flexible enough to support formulas, charts, graphs, and a plethora of formatting features to assist with data manipulation and visualization. The .xls format was a common go-to in sectors such as business and finance, or any field that necessitated data analysis and presentation. However, the advent of the more sophisticated .xlsx format has largely overshadowed its use. |
| Technical details | 🔵 Diving into the technical details, the .xls format, the golden standard for Microsoft Excel versions prior to 2007, is capable of storing a range of spreadsheet elements, including worksheets, formulas, and macros. As a proprietary binary format birthed by Microsoft, its undocumented internal architecture has posed a significant challenge to compatibility with third-party software. The format is comprised of binary records that contain data, formatting, and embedded objects, offering the possibility of multiple worksheets, a variety of functions, and inter-sheet referencing. .xls files also have the capacity to include Visual Basic for Applications (VBA) macros, opening up avenues for automation and complex calculations. Despite the existence of alternatives like OpenOffice Calc, and options to convert between .xls and other formats such as .xlsx, the .xls format continues to hold its ground, largely due to its compatibility with older Excel versions and legacy systems. However, it's important to note that the newer .xlsx format, which made its debut in Office 2007 and harnesses XML and ZIP technologies, brings to the table improved efficiency and security features. Despite the potential security risks associated with macros, the .xls format continues to be widely used. |
| Developer | 🔵 Microsoft |
| MIME type | 🔵 application/vnd.ms-excel |