DOC to DOCX
Convert legacy .doc to modern .docx.
Click to upload or drag & drop
Select a legacy Word document (.doc)
How to use the DOC to DOCX
- 1Upload your legacy Word document (.doc)
Drag and drop or click to select the legacy Word document (.doc).
- 2Convert to DOCX
Click Convert to DOCX and we process it on our secure server.
- 3Download
Your Word .docx file downloads automatically.
Convert DOC to DOCX
This tool upgrades a legacy Word document (.doc) to the modern .docx format with LibreOffice, keeping its content and formatting.
When to use it
- Modernise old .doc files to .docx.
- Open a very old Word file reliably.
- Standardise a folder of documents on .docx.
Private & secure
Your legacy .doc is opened and re-saved as a modern .docx with LibreOffice on our server. The upload is encrypted, the work runs in a private workspace, and both files are erased the instant the .docx is returned.
Frequently Asked Questions
Why upgrade .doc to .docx?
.docx is the modern, smaller, more compatible format. Converting old .doc files keeps them openable in current apps and reduces quirks.
Are my files uploaded to a server?
Yes. Reading the old binary Word format and writing clean .docx is a job for LibreOffice on the server, so the file is uploaded briefly. It is processed in isolation and deleted as soon as the result is sent.
Is it free? Is there a watermark or size limit?
Yes — free, no account, and no watermark on the .docx. Files up to 100 MB each are supported.