Format guide
What is ODT?
OpenDocument Text is an OpenDocument Text document — the open editable counterpart to DOCX, created by OASIS (2005). ODT keeps text, styles, and images in an open ZIP+XML package used by LibreOffice Writer. Choose ODT for open-standard drafting; convert to DOCX or PDF when reviewers insist on Word or a fixed layout.
ODT format specifications
- Full name
- OpenDocument Text
- Kind
- document
- File extension
- .odt
- MIME type
- application/vnd.oasis.opendocument.text
- Developer / standard
- OASIS · 2005
- Compression
- none or container
- Quality model
- Lossless / not lossy
- Container
- No / single bitstream typical
- Common codecs
- —
- Technical sources
- —
- Transparency
- Not supported
- Animation
- No (still / non-animated typical use)
- Typical size
- Small for text-heavy docs; larger with images
- Browser support
- Not rendered as a document in browsers — convert to PDF for universal reading
- Compatibility
- Best in LibreOffice; Microsoft Word and Google Docs can import with occasional layout shifts
ODT compression & quality
ODT compression: none or container. Lossless (or non-destructive packaging) keeps reconstructable data — size savings come from packing efficiency, not throwing detail away. Typical size profile: Small for text-heavy docs; larger with images. Quality note: Excellent in LibreOffice; Word import is usually good with style caveats
Quality: Excellent in LibreOffice; Word import is usually good with style caveats
Typical size: Small for text-heavy docs; larger with images
Transparency & animation
ODT does not support an alpha channel. Convert to PNG, WebP, AVIF, or SVG when you need transparent backgrounds.
ODT is a still-media or non-animated format in typical use. Use GIF, APNG, video, or animated WebP when you need motion.
ODT metadata
Core document properties (author, title, company, revision) plus app-specific custom properties.
Best use cases for ODT
- LibreOffice writing
- Open-format manuscript drafts
- Public-sector document standards
- Long-term editable archives without vendor lock-in
When to avoid ODT
- Tracked-change heavy Word-only legal teams without conversion
- Complex publisher layouts better suited to InDesign/PDF
- Forms that rely on Word ActiveX controls
- Emailing people who cannot open ODT
Advantages
- Truly open standard
- Editable with free software
- Inspectable package structure
- Good alternative to DOCX lock-in
Disadvantages
- Business world defaults to DOCX
- Advanced Word features may not round-trip
- Template ecosystems are thinner
- Recipients may ask you to reconvert
Compatibility
Best in LibreOffice; Microsoft Word and Google Docs can import with occasional layout shifts
Browsers: Not rendered as a document in browsers — convert to PDF for universal reading
Software support
- LibreOffice Writer
- OpenOffice Writer
- Microsoft Word
- Google Docs
- Format Convertly
Device support
- Desktops and laptops with office suites
- Modern desktops
- Phones and tablets with compatible apps
How to open ODT
Open ODT in LibreOffice Writer, or import into Word/Google Docs. For a locked copy, export or convert to PDF.
How to convert ODT
Convert ODT to DOCX for Word collaborators or to PDF for final distribution in Format Convertly — processing stays in your browser.
Popular ODT conversions
ODT comparison guides
Compare ODT with related formats to pick the right container for quality, size, and compatibility.
Best format guides featuring ODT
Decision pages that cite ODT — the next hop after a vs comparison.
Related formats
ODT tools
Tools extend the format graph beyond one-off conversion — compression, metadata, and utilities for real workflows.
ODT FAQ
What is a ODT file?
ODT is an OpenDocument Text document — the open editable counterpart to DOCX. ODT keeps text, styles, and images in an open ZIP+XML package used by LibreOffice Writer. Choose ODT for open-standard drafting; convert to DOCX or PDF when reviewers insist on Word or a fixed layout.
Is ODT lossy or lossless?
ODT is typically lossless or non-destructive in common use (none or container).
Does ODT support transparency?
ODT does not support an alpha channel. Convert to PNG, WebP, AVIF, or SVG when you need transparent backgrounds.
How do I open a ODT file?
Open ODT in LibreOffice Writer, or import into Word/Google Docs. For a locked copy, export or convert to PDF.
How do I convert ODT privately?
Convert ODT to DOCX for Word collaborators or to PDF for final distribution in Format Convertly — processing stays in your browser. Format Convertly keeps processing in your browser so files are not uploaded to a conversion server.
Are my ODT files uploaded on Format Convertly?
No. ODT conversion runs in your browser. Files are not sent to Format Convertly servers for processing.