Convert DOC to DOCX

Convert a DOC document to DOCX while keeping its formatting. The conversion runs with LibreOffice on our server and your file is deleted automatically afterwards.

Your file is deleted automatically after conversion.

How to convert DOC to DOCX

DOCX is the modern Office Open XML format: smaller files, better recovery from damage and full support in Microsoft Office, Google Workspace and Apple iWork. This converter opens the DOC with LibreOffice and saves it as DOCX, preserving text, styles, tables and images as faithfully as possible. It is the quickest way to open an incompatible file or to meet a format requirement without installing an office suite.

Step 1: Choose your DOC file
Drag and drop a .doc file onto the converter or click to browse. It works on desktop, tablet and phone.
Step 2: Convert to DOCX
The file is uploaded securely and saved as DOCX by LibreOffice in a temporary, isolated folder.
Step 3: Download the DOCX
Save the DOCX file to your device. You can start again with another file right away.

Good to know

Styles, tables, lists, images, headers and footers are converted; macros are never executed and are not carried over.

Why use this DOC to DOCX converter?

DOCX is the modern Office Open XML format: smaller files, better recovery from damage and full support in Microsoft Office, Google Workspace and Apple iWork.
No Office or LibreOffice installation required.
Formatting, tables and images are kept.
Uploaded files are deleted automatically after conversion.

Is it free?

Yes. Converting DOC to DOCX is free, with no watermark, signup or email required. Local conversions have no artificial file-size or daily cap; the practical limit is your device. This server-based conversion accepts files up to 25 MB.

Is my file uploaded?

This conversion needs a server engine, so the file is uploaded over an encrypted HTTPS connection, converted in an isolated temporary folder and deleted automatically as soon as the result is sent back. Nothing is kept, logged or shared.

About the formats

What is DOC?

DOC is the binary document format used by Microsoft Word up to Word 2003. It stores text, formatting, images and tables in a proprietary structure that Microsoft later documented publicly. Since Word 2007 it has been replaced by DOCX, which is based on XML and ZIP, but Word, LibreOffice and most word processors still open DOC files.

Use DOC only when you must share a document with someone on a very old version of Word or with a system that accepts nothing else. For everything else, DOCX is smaller, more robust and better supported. If you receive a DOC file, saving it as DOCX or PDF usually makes it easier to work with.

DOC (Word 97-2003 document)

What is DOCX?

DOCX (Word Open XML) is the modern editable format for word processor documents, used by Microsoft Word, Google Docs and LibreOffice. Despite the file extension, a DOCX file is a ZIP container holding the document text and structure as XML. It has been the default format for Word documents since 2007.

Use DOCX when you need an editable document that others can open and change, reports, letters, essays and any text that will be revised or worked on together. Its open XML structure also makes it the reliable choice for converting into PDF before sharing.

Word Document (DOCX)

Frequently Asked Questions

Is DOC to DOCX conversion free?

Yes. It is free, with no watermark, signup or email required. Local conversions have no artificial file-size or daily cap; the practical limit is your device. This server-based conversion accepts files up to 25 MB.

Will my DOC formatting survive the conversion?

Text, styles, tables, images and page setup are converted. Very specific features that DOCX does not support are simplified, so it is worth a quick look at the result.

Is it safe to convert doc to docx here?

Yes. The upload is encrypted, the file lives only in a temporary folder during conversion and it is deleted automatically afterwards. We do not read, keep or share your files.

Do I need to install anything?

No. Everything runs in a modern browser (Chrome, Edge, Firefox or Safari) on Windows, macOS, Linux, Android and iOS. There is no app, plugin or account.

Can I convert DOCX back to DOC?

Yes, there is a dedicated DOCX to DOC converter linked in the related tools below. Keep in mind that information dropped in one direction cannot always be restored in the other.

Need the opposite? Convert DOCX to DOC

Word