Convert LibreOffice Writer .odt documents to Microsoft Word .docx format. Preserves headings, paragraphs, lists, bold, italic, and alignment. Runs entirely in your browser.
ODT to DOCX
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Drop an .odt file or browse
LibreOffice Writer / OpenDocument Text
ODT to DOCX converts documents saved in OpenDocument Text (.odt) — the ISO/IEC 26300 standardized format used by LibreOffice Writer, Apache OpenOffice, and a number of government agencies, EU institutions, and public-sector systems that require open, vendor-neutral document formats under their procurement or interoperability policies — into Microsoft Word's .docx format. The most common reason someone lands on this tool: they drafted something in LibreOffice Writer, or they received a .odt file from a city council, a ministry, a university department, or an open-source-minded collaborator, and now need to hand it to a colleague or client who only has Microsoft Word, or upload it to a portal that flatly rejects anything other than .docx.
Both formats are, underneath, ZIP archives full of XML — that much is genuinely similar. Open either a .odt or a .docx with an archive tool and you will find the same general shape: a manifest, some metadata, and the document body split across a handful of XML files. Where they diverge is the schema. ODT stores text in content.xml against the OpenDocument schema, with styles defined separately in styles.xml. DOCX stores the same information in document.xml against the Office Open XML schema — standardized separately as ECMA-376 and later ISO/IEC 29500 — with its own styles.xml that shares no structural vocabulary with ODF's. Converting between them means translating one schema's idea of a heading, a list, or a run of bold text into the other's, not simply repackaging the same XML in a different wrapper. That translation step is why headings, body paragraphs, character formatting (bold, italic, underline, font size, color), bulleted and numbered lists, and paragraph alignment carry across reliably, while more structurally specific things — custom paragraph and character styles, header and footer content, footnotes, tracked changes and comments, and embedded OLE objects or drawing shapes — are the parts most likely to need a second look after conversion.
Fonts deserve a specific mention because they cause a specific, predictable kind of confusion. An .odt file typically references a font by name rather than embedding its actual outline data, unless the author explicitly enabled font embedding in LibreOffice, which is an option most people never touch. When the converted .docx is opened on a machine that does not have that exact font installed or licensed, Word silently substitutes a fallback. The text itself is untouched, but line breaks, page breaks, and overall pagination can shift slightly because the substitute font has different character widths. If a converted document opens looking slightly different from how it looked in LibreOffice, that is almost always a font-substitution issue on the receiving machine rather than a flaw in the conversion.
The conversion itself runs entirely in your browser — the .odt file is parsed locally against the ODF namespace and rebuilt as a .docx using the docx JavaScript library, without the file ever being transmitted to a server. That matters for the kind of documents that tend to travel in ODT form: government correspondence, procurement submissions, academic records, and internal reports from organizations with strict data-handling requirements.
Once you drop a .odt file onto the upload area, the tool unzips it in memory and reads content.xml and styles.xml directly against the OpenDocument namespace. It walks the document tree extracting headings (mapped to Word's Heading 1 through Heading 6 styles), body paragraphs, bulleted and numbered lists with their indentation levels, and inline character formatting — bold, italic, underline, font size, and color — attached to each run of text. Paragraph alignment (left, center, right, justified) is read from the style definitions and carried over. Tables are extracted as tab-separated text rather than reconstructed as native Word tables, since ODF and OOXML model table structure quite differently and a naive table-to-table mapping tends to break on anything beyond a simple grid. All of this is then handed to the docx library, which assembles a valid Office Open XML package client-side — no file is uploaded, and no server ever sees the document.
Upload your ODT file
Drop an OpenDocument Text (.odt) file from LibreOffice Writer, Apache OpenOffice, or a government/public-sector download onto the upload zone, or click to browse for it.
Confirm the file loaded
The file name and size appear once it is read. Nothing is uploaded at this point — the file is only held in your browser's memory.
Click Convert to DOCX
The tool unzips the ODT package, parses content.xml and styles.xml against the ODF namespace, and rebuilds the document as Office Open XML using the docx library.
Download the DOCX
The converted .docx file saves directly to your device and opens in Microsoft Word, Word Online, Google Docs, or LibreOffice Writer.
Check headers, footers, and tables
Since headers, footers, footnotes, and tracked changes are not carried over, and tables arrive as tab-separated text, give those sections a quick look and adjust them directly in Word if the original document used them.
Continue your workflow
Once the DOCX looks right, save it, send it on, or run it through the Word to PDF tool if you need a final, non-editable version for distribution.
Collaborating with Word Users
Convert LibreOffice Writer documents to DOCX so colleagues, clients, or reviewers who only have Microsoft Word can open, comment on, and edit them without a compatibility warning.
Government & Public-Sector Files
Many agencies, councils, and EU institutions issue official documents in ODF because it is an open ISO standard. Convert those .odt releases to DOCX when you need to edit them in Word or submit them to a system that only accepts Office formats.
Business Document Delivery
Send professional reports, proposals, and contracts drafted in LibreOffice as DOCX attachments to clients and partners who standardize on Microsoft Office.
Academic Submissions
Submit essays, theses, and assignments written in LibreOffice Writer as DOCX files when a university or journal explicitly requires Microsoft Word format.
Cloud Editing
Convert ODT documents to DOCX so they open and edit cleanly in Google Docs or Microsoft Word Online, both of which handle DOCX more predictably than ODT.
Template Migration
Move ODT document templates to DOCX so an entire team standardized on Microsoft Word can reuse them with consistent heading styles and list formatting.
PDF Export Pipeline
Convert ODT to DOCX first, then run the result through the Word to PDF tool when you need a polished, print-ready PDF but only have the original in OpenDocument format.
NGO & Cross-Organization Reporting
Nonprofits and international organizations that standardize internally on LibreOffice often need to hand off donor reports or grant documentation as DOCX to funders who work exclusively in Microsoft Office.
Browser-Only Conversion
Your document is unzipped and parsed locally using the docx library — no file is ever uploaded to a server, which matters for official and internal documents that should not leave your device.
Rich Formatting Support
Headings Heading 1 through Heading 6, bold, italic, underline, font size, text color, and paragraph alignment are all accurately mapped from ODF to Office Open XML.
List Preservation
Bulleted and numbered lists with their indentation levels are mapped to native Word list styles in the DOCX output, rather than being flattened into plain paragraphs.
Direct ODF Namespace Parsing
The converter reads content.xml and styles.xml directly against the OpenDocument schema instead of relying on a third-party conversion service, so there is no queue and no upload step.
Honest About Table Limitations
Rather than risk a broken or misaligned table, the tool converts ODF tables to tab-separated text, which you can convert into a native Word table in seconds using Word's built-in text-to-table feature.
No Desktop Software Required
You do not need LibreOffice, OpenOffice, or Microsoft Word installed on the machine you are using — the whole conversion happens in the browser tab.
Free — No Watermark
No watermark on the output file. Use it free with no account for files up to 40 MB, sign up free to raise the limit to 80 MB, or upgrade to Pro for 250 MB per file.
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