OPML vs TEXTILE
A detailed comparison of OPML Outline and Textile Markup — file size, quality, compatibility, and which format to choose for your workflow.
Technical Specifications
| Specification | .OPML | .TEXTILE |
|---|---|---|
| MIME type | text/x-opml | text/x-textile |
| Extension | .opml | — |
| Format | XML with nested <outline> elements | — |
| Standard | OPML 2.0 (2006) | — |
| Primary use | RSS subscription interchange | — |
| Extensions | — | .textile |
| Implementations | — | RedCloth (Ruby), php-textile, js-textile |
| Primary users | — | Redmine, Textpattern, early Rails |
| Encoding | — | UTF-8 |
Strengths Comparison
.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.
.TEXTILE Strengths
- More expressive than Markdown in classical usage (tables, footnotes, classes).
- Mature implementation in RedCloth (Ruby), php-textile, js-textile.
- Core format of Redmine — millions of daily users.
- Clean human-readable syntax.
Limitations
.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.
.TEXTILE — Limitations
- Market share decimated by Markdown since the mid-2000s.
- Not as widely supported outside the Ruby/Rails ecosystem.
- No CommonMark-style spec — implementations differ on edge cases.
- Rarely added to new projects in 2026.
Frequently Asked Questions
OPML (OPML Outline) 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.
TEXTILE (Textile Markup) 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.
Modern office suites — Microsoft Word, Google Docs, LibreOffice Writer, Apple Pages — open most OPML files with reasonable fidelity. If your installed software does not support OPML, 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 — open most TEXTILE files with reasonable fidelity. If your installed software does not support TEXTILE, convert to DOCX or PDF first using KaijuConverter; both open in virtually every reader, including free online viewers.
Upload the OPML 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 OPML (frames, legacy macros) may flatten to static content in the target format.
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