Convert DOC to DOCX
Last updated: June 1, 2026To convert DOC to DOCX, drop your DOC file into the converter above, then download the DOCX result. It's free, needs no sign-up, and there's no watermark. Your file is processed on our secure server over an encrypted connection and deleted automatically right after — never stored or shared.
Why convert DOC to DOCX?
Convert an old .doc file to modern .docx and bring a legacy Word document up to today's standard. DOC is Microsoft's pre-2007 binary format; DOCX is the XML-based Office Open XML default used by Word 2007 and later, Google Docs, Apple Pages and LibreOffice. Upgrading unlocks full editing, smaller files, better corruption recovery and wider app support. Free, no sign-up, no watermark. Your file uploads over a secure HTTPS connection, converts on our server and is deleted right after.
- You inherited a stack of Word 97-2003 .doc files and want them in the current .docx format so they open cleanly and stay fully editable in Microsoft Word, Google Docs or Pages without compatibility-mode warnings.
- An upload form, job portal, university submission system or CMS rejects .doc files (older binary documents are often blocked for security) and only accepts the modern .docx extension.
- You need to collaborate or use newer Word features, and the smaller, ZIP-compressed .docx is easier to email, less prone to corruption and recovers better if a file is ever damaged.
DOC vs DOCX
DOC · Legacy Word Document
DOC is the older (pre-2007) Microsoft Word binary format. It still opens almost everywhere, but DOCX is smaller, safer and the modern default.
DOCX · Microsoft Word
DOCX is the modern Microsoft Word format — a fully editable document you can open in Word, Google Docs, Pages and LibreOffice. The right choice while you're still writing or revising.
DOC to DOCX — frequently asked questions
Will my formatting, fonts and images stay intact?
Yes. The conversion is done with LibreOffice on our server, which preserves text, paragraph styles, headings, tables, lists, fonts and embedded images. Because DOCX is a superset of DOC, almost everything maps over faithfully; very old macros or legacy WordArt are the rare exceptions.
Is this converter really private and free?
It is completely free with no account, no watermark and no limits gimmicks. To be clear, conversion happens on our secure server, not inside your browser: your .doc is sent over an encrypted HTTPS connection, converted, and then deleted from the server immediately afterwards.
Why convert to DOCX instead of just keeping the DOC?
DOCX is the modern default. It produces noticeably smaller files thanks to built-in ZIP compression, supports current Word features, is an open ISO standard (29500) that Google and Apple implement more fully, and its modular XML structure recovers from corruption far better than the old binary .doc.
How do I convert DOC to DOCX?
Drop your DOC file (or several) into the converter, confirm DOCX is selected as the output, click convert, then download the DOCX file. The whole thing takes a few seconds.
Is this DOC to DOCX converter free?
Yes — it's completely free with no watermark and no sign-up required.
Is it safe to convert DOC to DOCX here?
Yes. Your DOC file is sent over an encrypted HTTPS connection to our conversion server, converted, and deleted automatically moments later — it is never stored, logged or shared.
Can I convert multiple DOC files at once?
Convert one DOC file at a time — finish one, then drop in the next.
Does it work on mobile?
Yes — the converter runs in any modern browser on phones, tablets and desktops.