Free online DOCX to DOC converter

Some older word processors, document-management systems, and office devices accept only the legacy DOC format. Converting a DOCX file lets you edit or share it with those systems without requiring the recipient to install newer Microsoft Office software.

What the DOCX format is

DOCX is the default Word document format introduced with Microsoft Office 2007. It uses a ZIP package containing XML files and separate resources such as images, styles, headers, footers, and document properties.

Microsoft Word, LibreOffice Writer, Google Docs exports, and many other office applications create DOCX files. You commonly encounter them when receiving documents made in current versions of Word or when saving a new word-processing document.

What the DOC format is

DOC is the older Microsoft Word binary document format used by Word versions through Word 2003. It stores text, formatting, tables, images, and other document features in a binary file structure rather than the XML package used by DOCX.

DOC remains useful for legacy applications, older operating systems, document workflows restricted to Word 97–2003 files, and hardware or archival systems that cannot read DOCX. Its main advantage is compatibility with older software; its disadvantages include a lower feature ceiling, less efficient storage, and greater risk of formatting changes when modern DOCX features are downgraded.

How to actually convert DOCX to DOC

Microsoft Word

1. Open the DOCX file in Microsoft Word.
2. Select File → Save As or File → Save a Copy.
3. Choose a destination and select Word 97-2003 Document (*.doc) as the file type.
4. Enter a filename ending in .doc, then select Save.
5. If Word displays a compatibility warning, confirm the conversion and review the saved file.

LibreOffice Writer

1. Open the file in LibreOffice Writer.
2. Select File → Save As.
3. Choose Word 97–2003 (*.doc) in the file-type list.
4. Enable automatic extension handling if available, save the file, and confirm Use Word 97–2003 Format when prompted.

For batch conversion with LibreOffice installed, run soffice --headless --convert-to doc:"MS Word 97" --outdir output input.docx. The output directory must exist, and the generated file normally keeps the original base filename with a .doc extension.

Online conversion

You can convert the file for free on the 101convert.com website without installing software. Upload the DOCX file, select DOC as the output format, start the conversion, and download the resulting file; avoid this method for documents containing confidential information unless the service’s current privacy terms meet your requirements.

Quality, compatibility, and limitations

DOC cannot represent every feature available in modern DOCX. Conversion can alter themes, newer SmartArt objects, content controls, advanced typography, equations, tracked changes, comments, fields, section settings, and complex tables. Embedded fonts may not travel with the document, so line wrapping and pagination can change on another computer.

After conversion, open the DOC file in the target application and check page breaks, headers and footers, tables, images, hyperlinks, lists, footnotes, tracked changes, and special characters. Keep the original DOCX as the editable source because saving to DOC may discard features that cannot be represented in the older format.