DOC to DOCX Converter

Convert DOC to DOCX — Free Online Tool

Upgrading DOC to DOCX gives you access to modern Word features, smaller file sizes (DOCX uses ZIP compression), and better compatibility with current software. DocoLine makes this conversion fast, free, and effortless — right in your browser.

How to Convert DOC to DOCX

Upload your DOC file — drag and drop your document or click "Browse Files" to select it from your device.
Click "Convert" — our server processes your file securely in the cloud. Most conversions complete in under 5 seconds.
Download your DOCX file — click the download button to save your converted document. Files are auto-deleted from our servers within 1 hour.

Why Convert DOC to DOCX?

Modernizing legacy documents, enabling collaboration in Microsoft 365, and reducing file storage costs.

What Gets Preserved?

Text, formatting, tables, images, and document structure are maintained during the upgrade to the modern format.

Why Choose DocoLine for DOC to DOCX Conversion?

100% Free — no sign-up, no watermarks, no hidden charges. Convert as many files as you need.
High-Fidelity Conversion — our engine preserves your document's layout, fonts, images, and formatting with professional accuracy.
Fast & Secure — 256-bit SSL encryption protects your files. All uploads are permanently deleted within 1 hour.
No Software Needed — works entirely in your browser. No Microsoft Office, LibreOffice, or any other software required.
Cross-Platform — use on Windows, Mac, Linux, iOS, or Android — anywhere you have a browser.
Batch Upload — convert multiple files at once to save time on large projects.