Convert DOC to DOCX

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You have the option to convert your doc file to docx, as well as a variety of other formats, using our free online converter.

How to convert doc to docx?

How to convert docx to doc?

Step 1

Upload doc-file

You can select doc file you want to convert from your computer, Google Drive, Dropbox or simply drag and drop it onto the page.

Step 2

Select «to docx»

Choose docx or any of the other 200+ supported formats you'd like to convert to.

Step 3

Download your docx file

Please wait for the conversion to complete, then click on the download button to obtain your converted file in the docx format.

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Understanding the importance of the security of our users' data, we have implemented a number of measures to ensure reliable file conversion without the risk of information leakage or privacy violations.

Data encryption

All information uploaded to our platform is SSL encrypted, ensuring privacy during transmission.

Safe storage

After the conversion is completed, the files are stored on secure servers for 24 hours and are automatically destroyed, excluding access by third parties.

Harmless scripts

Our file conversion tools are regularly tested for malicious code or vulnerabilities to eliminate the risk of a potential cyber attack.

Best tool to convert doc to docx

doc to docx Fast and easy

Simply drag and drop your doc files onto the webpage, and you'll be able to convert them to docx or over 250 different file formats, all without having to register, provide an email address, or include a watermark.

Secure doc to docx Conversion

As soon as you upload your doc 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.

No Software Installation Required

You don't have to go through the hassle of installing any software. We handle all doc to docx conversions in the cloud, which means that none of your computer's resources will be used in the process.

Microsoft Word Document

Extension	.doc
Category	🔵 documents
Programs	🔵 Microsoft Word 🔵 OpenOffice.org Writer 🔵 IBM Lotus Symphony 🔵 Apple Pages 🔵 AbiWord
Main program	🔵 Microsoft Word
Description	🔵 The .doc format is a proprietary document file format used by Microsoft Word, primarily in versions before Word 2007. It is a binary file format for text documents that may contain rich text content, images, tables, graphs, and other elements typical of word processing documents. The .doc format was widely used for creating and sharing documents in business and academic settings. However, it has largely been replaced by the .docx format in more recent versions of Microsoft Word.
Technical details	🔵 The `.doc` format, closely associated with Microsoft Word, was a dominant word processing standard prior to the emergence of the `.docx` format in Office 2007. It was a proprietary binary format, meaning its structure was not accessible for third-party software developers. This format contained binary codes for displaying text, images, and formatting within Word documents. It encompassed text, formatting specifications, images, and other components, supporting various text formats. While primarily linked to Word, other processors like OpenOffice also had support for it, although compatibility varied across different Word versions. The `.docx` format, introduced later, is based on Office Open XML, providing greater efficiency through the use of XML and ZIP compression.
Developer	🔵 Microsoft
MIME type	🔵 application/msword 🔵 application/kswps

Office Open XML Document

Extension	.docx
Category	🔵 documents
Programs	🔵 Microsoft Office 🔵 LibreOffice 🔵 Kingsoft Office 🔵 Google Docs
Main program	🔵 Microsoft Office
Description	🔵 .docx The .docx format is the default file format for documents created in Microsoft Word starting with Word 2007 and later versions. It is part of the Office Open XML specification and uses XML and ZIP compression to create smaller file sizes. The .docx format supports text, images, styling, and complex document formatting. Compared to the older .doc format, it is more modern and open, and has become the standard for word processing documents in many environments.
Technical details	🔵 The `.docx` format, introduced with Microsoft Office 2007, replaces the older `.doc` format in Microsoft Word. It is based on the Office Open XML standard, utilizing XML to outline document structure and content, which makes it more transparent and easier to process. `.docx` files are essentially zip archives that contain XML files and resources, organized into folders such as 'word', 'docProps', and 'rels' for text, properties, and relationships. The main text is located within `document.xml`, while styling is stored in separate files like `styles.xml`, and directories house embedded media. This format promotes interoperability, reduces file sizes, and enhances recovery from corruption. Most modern word processors support `.docx`, and Microsoft provides compatibility packs for older Word versions. For security reasons, macros are stored in a separate `.docm` file. `.docx` represents a significant advancement in document format technology, with a focus on openness, interoperability, and efficient data management.
Developer	🔵 Microsoft
MIME type	🔵 application/vnd.openxmlformats-officedocument.wordprocessingml.document