DOC to DOCX Converter — Batch Convert Word Documents to Modern Format

• Preserves fonts, tables, images, headers, footers, and page layout
• Converts hundreds of DOC files to DOCX in one batch
• Works offline — no files uploaded to the cloud
• Provides command-line interface for automation and scripting
• Includes a 30-day free trial with no limitations

Download Total Doc Converter and modernize your Word document archive today.

DOC vs DOCX: What Is the Difference?

DOC is a proprietary binary format introduced by Microsoft Word in 1983. For over two decades it was the default document format across the business world. DOC files use a compound binary structure (OLE) that stores text, formatting, images, and macros in a single binary blob. The format is fully supported only by Microsoft Word — other word processors open DOC files with varying degrees of accuracy.

DOCX replaced DOC as the default format starting with Word 2007. It is an Office Open XML format that stores document content as a ZIP archive of XML files. DOCX files are smaller (typically 50–75% of the equivalent DOC), open faster, and are less prone to corruption. The XML-based structure also makes them easier to process programmatically and more compatible with third-party applications.

While modern Word versions still open DOC files, certain features behave differently in compatibility mode. Embedded objects, complex tables, and advanced formatting may render incorrectly when a DOC file is opened in newer editors. Converting DOC to DOCX with a dedicated tool ensures a clean transition without layout shifts or data loss.

How to Convert DOC to DOCX

• Step 1. Launch Total Doc Converter. The left panel displays a folder tree for quick navigation.
• Step 2. Browse to the folder that contains your DOC files. The file list in the center shows all supported document types.
• Step 3. Check the DOC files you want to convert. Use Check All to select every file in the folder for batch conversion.
• Step 4. Click DOCX in the format toolbar at the top of the window.
• Step 5. Set the destination folder. Optionally add watermarks, headers, footers, or adjust page layout in the conversion wizard.
• Step 6. Press Start. The converter processes all selected files and saves the DOCX output to your chosen folder.

The entire conversion takes seconds, even for large batches. Your original DOC files remain untouched.

Command-Line Conversion

Total Doc Converter includes a command-line interface that lets you convert DOC to DOCX from scripts, batch files, or scheduled tasks. Example:

DocConverter.exe C:\Data\report.doc C:\Output\report.docx -c DOCX

Use wildcards to convert an entire folder in one command:

DocConverter.exe C:\Data\*.doc C:\Output\ -c DOCX

This makes it easy to integrate DOC-to-DOCX conversion into automated workflows, migration scripts, or server-side document processing. Write a .bat file once and reuse it whenever new DOC files appear.

Why Use Total Doc Converter?

Batch processing. Select hundreds or thousands of DOC files and convert them to DOCX in a single run. No need to open each file in Word and re-save manually.

Formatting preservation. Fonts, tables, images, headers, footers, page breaks, columns, and styles survive the conversion. Your DOCX files look just like the DOC originals.

Folder structure support. When converting files across multiple subfolders, the converter recreates the original directory tree in the output location. No manual sorting required afterward.

Watermarking. Add text or image watermarks during conversion — useful for marking documents as "DRAFT", "CONFIDENTIAL", or stamping them with your company logo.

No cloud uploads. All processing happens locally on your PC. Sensitive contracts, legal documents, and internal reports never leave your machine.

20+ output formats. Besides DOCX, convert DOC to PDF, HTML, RTF, TXT, ODT, XHTML, JPEG, TIFF, and more — all from the same tool.

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Total Doc Converter Customer Reviews 2026

"We had 15,000+ DOC files accumulated over 20 years. Converting them one by one in Word was not an option. Total Doc Converter processed the entire archive in under an hour. Formatting, tables, and embedded images all came through perfectly in DOCX."

David Kravchenko IT Manager, Law Firm

"Our department switched to Microsoft 365 and needed all legacy documents in DOCX format. The batch conversion saved us weeks of manual work. The folder structure feature was a lifesaver — everything stayed organized exactly as before."

Angela Torres Office Administrator

"I set up a scheduled task with the command-line version to auto-convert any new DOC files dropped into a shared folder. Runs on our Windows Server without issues. The only thing missing is a Linux version, but the Windows command line covers our needs."

Martin Lindqvist Systems Administrator

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