DOC to DOCX
Upgrade old Word 97–2003 .doc files (and RTF) to modern .docx.
Your files stay on this device
Good to know: Text and paragraphs are recovered from .doc files; complex formatting, tables and images from .doc aren't carried over.
or drop them here, or paste with Ctrl+V
DOC, RTF · up to 20 files · stays on your device
How to use DOC to DOCX
- 1Add one or more files — drag and drop or tap to choose. Accepted: DOC, RTF.
- 2No settings needed.
- 3Press “Convert to DOCX”. Processing happens on your device.
- 4Download your DOCX, one by one or all together as a ZIP.
About this tool
Upgrade old Word 97–2003 .doc files (and RTF) to modern .docx. Your files are processed locally in your browser, so they're never uploaded, queued or stored — which also makes it fast. It's part of our free word tools, which work together — you can pass the result straight into related tools below.
- Accepts
- DOC, RTF
- Gives you
- DOCX
- Files at once
- Up to 20
- Processed
- On your device
Frequently asked questions
Is DOC to DOCX free?
Yes. There's no sign-up, no watermark and no usage limit.
Are my files uploaded to a server?
No. DOC to DOCX runs entirely in your browser. Your files never leave your device and nothing is stored — close the tab and everything is gone.
Which file types can I use?
DOC, RTF. Files are checked by their actual content, not just the extension, so renamed or damaged files are caught early.
Is there a file size limit?
Each file can be up to 200.0 MB, and you can process up to 20 files at once. Because processing uses your device's memory, very large files work best on a computer.
Does it work on my phone?
Yes. It works in modern mobile browsers on Android and iPhone. Heavier jobs (large PDFs, OCR) are faster on a computer.
Are there any limitations?
Text and paragraphs are recovered from .doc files; complex formatting, tables and images from .doc aren't carried over.