Convert XLSX to XLS Online

1) Upload XLSX file to convert

Drop files here, or Click to select

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Allowed file types: qif, parquet, feather, excel, ris, bib, ods, xls, xlsx, xlsm, csv, tsv, tab, xlsb, xltx, xlr, pxl, qpw, wb3, wq1, dbf, wk3, 123, mdb, evtx, pages, numbers, sqlite

2) Set converting XLSX to XLS options

3) Get converted file

DOWNLOAD CONVERTED FILE

Full version

Get Total Excel Converter to convert XLS, XLSX, ODT, XLSM, etc. safely.

Convert Excel Files in Batch!;
Convert XLSX to XLS and in many other formats
Convert hundreds of spreadsheets in 3 clicks;
Both MS Office and OpenOffice files;
Have a desktop converter that works without Internet;
Keep your files safe, don't send them to the web;
Get more accurate results with the more poweful engine.

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Total Excel Converter

Total Excel Converter supports almost all Excel extensions: XLS, XLSX, XLSM, XLSB, XLT, XLTM, XLTX, XLK, XLW. When the new Office is released, we will add new file types too.

With Total Excel Converter you can convert Excel to PDF and add a digital signature in one go.

Total Excel Converter can convert each page of your spreadsheet into a separate file.

Tell Total Excel Converter to copy original time stamps if you don't want to change the date.

Have an outdated Microsoft Office 2003? Update all your old files to the new format in one go. Convert XLS files to XLSX in batches.

Total Excel Converter will help you to convert Excel 2003 XML Files (rare option!)

Total Excel Converter has a built-in renamer to give your files new descriptive names. Include a counter, a date or worksheet name into the file name and your files will be in perfect order.

Convert Excel spread sheets via our most straightforward interface.

The widest list of output file types: DOC, PDF, HTML, MHT, XHTML, CSV, TXT, TIFF, JPEG, SVG, RTF, XML, XLS, XLSX, ODS, ODT, Lotus, DIFF, SYLK, LATEX, SQL, DBF, Access!

Total Excel Converter can combine several Excel spread sheets into one TIFF or PDF file.

Want to quickly find a file? Total Excel Converter helps you to preview any document you select.

Add your logo or any other image to the header or the footer of the output file.

Want more order? Add page counters or a date to every page of the output files. Sequential numbering of several folders is avaialble.

Total Excel Converter can copy original time stamps if you want to keep them.

When you convert Excel to PDF you can set user permissions, password-protect your files or sign with a digital signature. Get PDF, PDF/A and non-searchable PDFs.

Total Excel Converter can be run via command line (get the ready-to-use command line from GUI).

How to convert XLSX to XLS?

Upload Your File: Go to the site, click on «Upload File,» and select your XLSX file.

Set Conversion Options: Choose XLS as the output format and adjust any additional options if needed.

Convert and Download: Click «Download Converted File» to get your XLS file.

Cloud Based

There is no need to install any software to convert XLSX to XLS with CoolUtils. Simply access the internet, and you can easily convert your file online with our service.

Secure

Our hardware operates in top-tier, highly secure data centers equipped with advanced electronic surveillance and multi-factor access control systems.

Ease of Use

Converting from XLSX to XLS has never been so simple. Our intuitive interface lets you convert files in just a few clicks.

Privacy

We understand the importance of privacy, which is why we've developed a comprehensive privacy policy detailing how we handle your files and personal information. You can read the policy here.

XLSX File

File extension	.XLSX, .EXCEL
Category	Document File
Description	XLSX is a format from Office Open XML family, a native MS Excel file type starting from version 2007. As opposite to XLS, this format uses ZIP compression that makes XLSX files smaller in size. Actually XLSX file is an archive of XML-documents. The cells in XLSX table can contain plain text, formulas or graphic elements. XLSX can be read in MS Office 2007 and later, Universal Viewer, OpenOffice, MS Office Excel Viewer, Corel WordPerfect Office. This format doesn’t support macros.
Associated programs	Microsoft Excel 2007 OpenOffice OxygenOffice Progessional (Linux)
Developed by	Microsoft
MIME type
Useful links	More detailed information on XLSX files
Conversion type	XLSX to XLS

XLS File

File extension	.XLS
Category	Document File
Description	XLS is the most popular format for storing table data. It is native Microsoft Excel format with data stored in numbered cells that form columns and rows. The top line and left column of each table contains numbering of each cell that can contain either static or dynamic data that is calculated from formulas. XLS features powerful calculation and charts-building options, as well as rich text formatting. XLS is compatible with numerous table editors such as Calc, PlanMaker, OpenOffice, etc.
Associated programs	Microsoft Excel Microsoft Excel Viewer OpenOffice
Developed by	Microsoft
MIME type	application/vnd.ms-excel
Useful links	More detailed information on XLS files

2025-04-24

Great tool! Quickly converted my XLSX to XLS without installing anything. Super easy to use!

Sarah Thompson

Rating XLSX to XLS

4.9 (1820 votes)Rate It

FAQ ▼

What is an XLSX file?

An XLSX file is a Microsoft Excel spreadsheet format introduced with Excel 2007. It uses the Open XML standard and supports advanced features like formulas, charts, and styles.

What is an XLS file?

An XLS file is the older Excel format used in Excel 97-2003. It�s based on a binary format and has more limited support for modern Excel features.

Why convert XLSX to XLS?

Converting XLSX to XLS ensures compatibility with older versions of Microsoft Excel and third-party tools that do not support the newer XLSX format.

Will formatting and formulas be preserved during conversion?

Most formatting and formulas are preserved. However, features exclusive to XLSX (like sparklines or certain charts) may be lost or downgraded.

Can I open XLSX files in Excel 2003?

Not directly. Excel 2003 requires a compatibility pack or conversion to XLS format to open XLSX files properly.

Is it safe to use an online XLSX to XLS converter?

Yes. Trusted services handle files securely and delete them after conversion. For sensitive documents, consider using offline tools.

Do I need special software to convert XLSX to XLS?

Microsoft Excel can save files in XLS format directly. Other tools like LibreOffice, OpenOffice, and online converters also support this conversion.

Online XLSX to XLS Conversion

Microsoft Excel files come in different formats, and while XLSX is the newer, more powerful standard introduced in Excel 2007, many users and systems still rely on the older XLS format for compatibility. Converting XLSX to XLS helps bridge this gap and ensures smooth collaboration across various platforms and software versions.

The XLSX format uses XML-based compression, making it smaller and more efficient. However, some legacy systems, macros, or third-party tools may not support XLSX files properly. That’s where XLS comes in — an older binary format that offers broader backward compatibility.

Why Convert XLSX to XLS?

Conversion is essential when working with older versions of Excel, outdated plugins, or enterprise systems that require .xls format. Converting ensures your spreadsheet is accessible, functional, and free from formatting errors that can occur when opening newer files in older software.

How It Works

Our online XLSX to XLS converter makes the process easy. Upload your XLSX file, and receive a fully compatible XLS file in return. The conversion preserves all formulas, cell formatting, charts, and data structure without loss.

CoolUtils Advantage

Unlike basic converters, CoolUtils handles large or complex spreadsheets with ease. Whether your file contains pivot tables, conditional formatting, or embedded images, our tool ensures accurate conversion with minimal effort.

Use XLSX to XLS conversion to maintain compatibility and ensure your Excel documents work seamlessly, no matter where they’re opened.

Feature	Online Converters	CoolUtils Desktop	Excel Built-in	Other Software
Batch Conversion	Limited	✅ Unlimited	Manual only	Limited
File Size Limit	1-5MB	✅ No limits	System dependent	Varies
Privacy & Security	Upload required	✅ 100% offline	✅ Local only	Varies
Conversion Speed	Internet dependent	✅ Fast local processing	Slow	Medium
Advanced Options	Basic	✅ Full customization	Limited	Basic
Cost	Free/Premium	One-time purchase	Requires Office	Subscription
Formatting Preservation	Good	✅ Excellent	Good	Varies
Multiple Formats Support	Limited	✅ 40+ formats	Few formats	Limited