Convert your .doc files to .docx format online for free. No software to install. Fast, secure, and easy.
Free — 3 conversions per day
Drag and drop your .doc file or click to browse.
Select DOCX as your output format.
Click Convert and download your .docx file.
Converting from DOC (Microsoft Word Binary Document) to DOCX (Office Open XML Document) helps you work with your content in a different application or workflow. DOC and DOCX serve different purposes, and converting between them bridges the gap.
DOC (Microsoft Word Binary Document, introduced in 1983) uses None (OLE2 compound binary streams) compression. DOCX (Office Open XML Document, introduced in 2007) uses ZIP (containing XML parts) compression. DOC browser support: None (requires office application). DOCX browser support: None (requires office application or online viewer).
The quality impact depends on the specific settings used during conversion. DOCX uses compression that may affect quality depending on the chosen settings.
Typical DOC file size: A 20-page report with images: ~1-8 MB. Typical DOCX file size: A 20-page report with images: ~500 KB - 5 MB. Expect a dramatic file size reduction — often 5-20x smaller — when converting from uncompressed DOC to DOCX.
For the best conversion results, always start from the highest quality source file available. Converting from a previously compressed file compounds any existing compression artifacts. When in doubt, use higher quality settings — you can always re-convert at lower quality later, but you cannot recover quality that has been lost.
Convert DOC to DOCX with 3 free conversions per day. No hidden fees.
Create a free account in 10 seconds and start converting immediately. No credit card required.
Files are encrypted during transfer, processed on secure servers, and deleted immediately after conversion.
Convert files from any device — desktop, tablet, or phone. No software to install, works in any modern browser.
SquishConvert supports over 358 file conversion combinations across images, documents, audio, and video.
Your converted .docx file maintains the best possible quality. No unnecessary compression or quality loss.
You get 3 free conversions per day. Upgrade to Pro for unlimited conversions.
Most files convert in under 10 seconds. Larger files may take a bit longer depending on size.
Yes. Files are encrypted during transfer, processed on secure servers, and deleted immediately after conversion. We never store your files.
Currently, SquishConvert converts one file at a time. Batch conversion is coming soon — stay tuned!
Free users can convert files up to 10 MB. Pro users can convert files up to 500 MB.