Document Format Comparison

ODT vs DOCX — OpenDocument vs Microsoft Word

ODT (OpenDocument Text) is the ISO standard for word processing documents, used by LibreOffice and OpenOffice. DOCX is Microsoft's OOXML standard, used by Word and Google Docs. Both are open standards (yes — DOCX is also an ISO standard), but DOCX has won the market: virtually every organization expects DOCX as the interchange format.

ODTvsDOCX

Quick Verdict

Use ODT when…

Use ODT if you work exclusively in LibreOffice/OpenOffice and don't need to share with Word users, or if you're storing documents in an open-standard archive.

Use DOCX when…

Use DOCX for anything you share with colleagues, submit to employers or agencies, or need to open in Google Docs, Word Online, or any collaboration platform. DOCX is the de facto professional standard.

ODT vs DOCX: Feature Comparison

Feature	ODT	DOCX
Primary application	LibreOffice Writer, OpenOffice	Microsoft Word, Google Docs
ISO standard	ISO 26300	ISO 29500
Track changes support	Yes	Yes (more features)
Macro support	Basic macros	VBA macros (full)
Compatibility with Word	Good (minor layout shifts)	Perfect
File size	Smaller (compressed XML)	Slightly larger

When ODT wins

✓Primary application: LibreOffice Writer, OpenOffice
✓ISO standard: ISO 26300
✓Track changes support: Yes

When DOCX wins

✓Primary application: Microsoft Word, Google Docs
✓ISO standard: ISO 29500
✓Track changes support: Yes (more features)

Frequently asked questions

Does ODT convert to DOCX without losing formatting?

For simple documents (text, basic formatting, tables), conversion is excellent. Complex documents with advanced styles, custom themes, or fields may have minor layout differences. Review the converted DOCX in Word before distributing.

Can Google Docs open ODT files?

Yes — Google Docs can import ODT files. The conversion fidelity is similar to LibreOffice → Word: good for simple documents, potentially imperfect for complex layouts.