ODT vs OPML
A detailed comparison of OpenDocument Text and OPML Outline — file size, quality, compatibility, and which format to choose for your workflow.
OpenDocument Text
Documents & TextODT is the open-standard document format used by LibreOffice Writer and other open-source word processors. It offers full document editing capabilities without vendor lock-in.
About ODT filesOPML Outline
Documents & TextOPML (Outline Processor Markup Language) is an XML format for structured outlines and lists. It is most widely used for exchanging RSS feed subscription lists between podcast apps and feed readers, and for hierarchical note-taking.
About OPML filesStrengths Comparison
ODT Strengths
- Truly open standard — ISO/IEC 26300, vendor-neutral.
- Native format of LibreOffice and OpenOffice, two of the largest FOSS projects.
- Human-readable XML, easy to script and parse.
- Preferred by many governments for archival and public records.
- ZIP compression keeps files compact.
OPML Strengths
- Standard RSS subscription interchange format.
- Simple XML — easy to parse and generate.
- Highly extensible via arbitrary attributes.
- Supported by every major outline and RSS tool.
Limitations
ODT Limitations
- Microsoft Word support exists but subtly breaks formatting when round-tripping.
- Less common outside the FOSS ecosystem — most business workflows default to DOCX.
- Fewer third-party tools than for DOCX.
- Complex spreadsheet-like embedded content may not round-trip perfectly.
OPML Limitations
- XML verbosity — larger than a JSON-based equivalent.
- Specification is loose — different tools disagree on edge cases.
- Primary use (RSS reading) has shrunk dramatically since Google Reader.
- No strong central stewardship.
Technical Specifications
| Specification | ODT | OPML |
|---|---|---|
| MIME type | application/vnd.oasis.opendocument.text | text/x-opml |
| Container | ZIP (OpenDocument Format) | — |
| Standard | ISO/IEC 26300 (OASIS ODF 1.0 / 1.3) | OPML 2.0 (2006) |
| Native to | LibreOffice, OpenOffice, Collabora | — |
| Extension | — | .opml |
| Format | — | XML with nested <outline> elements |
| Primary use | — | RSS subscription interchange |
Typical File Sizes
ODT
- Short letter 10-30 KB
- Academic paper (20 pages) 50-200 KB
- Illustrated report 1-10 MB
OPML
- Typical RSS reader export (50 feeds) 5-30 KB
- Deep outline (Scrivener novel plan) 20-200 KB
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Convert between ODT and OPML online, free, and without installing anything. Encrypted upload, automatic deletion after 60 minutes.
Frequently Asked Questions
ODT (OpenDocument Text) is a document format used to store paginated text, with optional formatting, tables, images, hyperlinks, headers and footers. It sits in the documents & text family and is typically associated with a specific office suite or publishing pipeline that defined the format and ships the canonical reader.
ODT (OpenDocument Text) is a document formato used to store paginated text, com optional formatoting, tables, images, hyperlinks, headers e footers. It sits no documents & text family e is tipicamente associated com a specific office suite ou publishing pipeline that defined the formato e ships the canonical reader.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — open most ODT files with reasonable fidelity. If your installed software does not support ODT, convert to DOCX or PDF first using KaijuConverter; both open in virtually every reader, including free online viewers.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — abrir most ODT arquivos com reasonable fidelity. If your installed software does not support ODT, converter to DOCX ou PDF first usando KaijuConverter; both abrir in virtually every reader, including grátis online viewers.
Upload the ODT to KaijuConverter and pick DOCX, PDF, ODT, RTF, HTML, Markdown, or plain text. Our pipeline runs LibreOffice headlessly plus pandoc for text formats — the same engines behind professional document pipelines. Styles, tables, images, and hyperlinks survive the conversion intact.
Yes, to a high degree. Standard fonts, headings, lists, tables, images, hyperlinks and page structure transfer cleanly. Custom fonts substitute to the closest match if not embedded; obscure layout features unique to ODT (frames, legacy macros) may flatten to static content in the target format.