How do I convert DOCX to ODT?

Add your DOCX file to the upload area above, then press Convert. The ODT file downloads straight to your device. You do not need an account, and there is no watermark.

Are my files uploaded to a server?

No. This conversion runs entirely inside your browser using WebAssembly, so the file never leaves your device — you can even disconnect from the internet after the page loads and it will still work.

Does converting to ODT reduce quality?

Text, structure and images carry over faithfully. Exact page layout does not, because ODT lays content out differently from DOCX. Check headings, tables and page breaks in the result.

How large a file can I convert?

Up to 100 MB per file for this conversion. Because the work happens in your browser, the practical limit is your device's memory — larger files work on a desktop with plenty of RAM and may fail on an older phone.

Can I convert several files at once?

Yes. Add as many as you like and press Convert All. Each file is processed independently, so one failure does not stop the rest, and you can download everything together as a ZIP.

Can I use this on my phone?

Yes. FileTools360 works in mobile browsers on iOS and Android, including choosing files straight from your camera roll. Very large videos may run out of memory on a phone — those are better converted on a laptop.

DocumentLayout rebuiltRuns in your browser

DOCX to ODT Converter

Turn DOCX files into ODT in a couple of clicks. The modern Microsoft Word document format. The open standard word-processing format. Content is preserved and the layout is rebuilt for the target format.

On your deviceNever uploadedGone when you close the tabHow this works

Drop your files here

DOCX files (.docx) · up to 100 MB each

or paste files from your clipboard

Ready when you are

Drop a DOCX file above and FileTools360 will turn it into ODT — right here on your device, without uploading anything.

⌘K to search converters

How to use it

1
Add your DOCX files
Drag them onto the upload area, choose them from your device, or paste them from your clipboard. You can queue several at once.
2
Adjust the settings if you want to
There is nothing to configure — this conversion has no quality trade-offs to make.
3
Convert and download
Press Convert. Everything happens on your own device — nothing is uploaded. Download files one by one, or grab them all as a ZIP.

DOCX and ODT explained

DOCX is a ZIP archive containing XML that describes a Word document's content and formatting. Renaming one to .zip and opening it shows the structure directly.

ODT is the OpenDocument text format, an ISO standard that works much like DOCX — a ZIP of XML — but developed openly rather than by a single vendor.

Where DOCX files come from: Microsoft Word, Google Docs exports and Pages exports.
Where ODT is used: LibreOffice, OpenOffice and public-sector document policies.

DOCX vs ODT

The two formats solve different problems, which is why converting between them involves trade-offs rather than a straight upgrade.

DOCX compared with ODT
Property	Source	Target
Compression	Lossless	Lossless
Introduced	2007	2005
Browser support	Word, Google Docs, Pages, LibreOffice.	LibreOffice natively, Word with some fidelity loss.

DOCX is stronger at: Fully editable with tracked changes and comments. Supported by Word, Google Docs, Pages and LibreOffice. Compact, because the XML is compressed.
ODT is stronger at: Genuinely open ISO standard. Fully editable. Default in LibreOffice.

Why convert DOCX to ODT?

People make this switch when they run into the limits of DOCX: sending a final version where layout must be guaranteed. ODT is the better fit when working in LibreOffice or under an open-standards requirement.

DOCX limitations that prompt the switch: Layout can shift between applications and font availability. Not suitable as a final, fixed-layout deliverable. Macros in .docm variants are a security concern.
What you give up: Word support exists but loses some formatting. Less common in commercial settings.

What is preserved when converting DOCX to ODT?

Both formats store the content without discarding data, so this conversion preserves it exactly. The file size may change because the two formats compress differently, but the content itself is unaffected.

About these formats

Source

Word Open XML Document

The modern Microsoft Word document format.

Extensions: .docx
MIME type: application/vnd.openxmlformats-officedocument.wordprocessingml.document
Best for: Editable documents · Collaboration · Office workflows
Compatibility: Word, Google Docs, Pages, LibreOffice.

Target