CONVERT
TXT → OPML
Fast, secure TXT to OPML conversion. No registration required.
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Starting point: TXT is the plain-text format — just characters and line breaks, no formatting. Natural next step, a OPML. A TXT → OPML conversion gives you the right artefact for the next step in the document life cycle. Maybe you are moving from drafting to distribution, or from a proprietary format into an open one, or simply answering a colleague who asked for OPML. KaijuConverter delivers a faithful re-render without any desktop software install. Context: TXT is the plain-text format — just characters and line breaks, no formatting. OPML is a document format oriented around a particular office suite or publishing pipeline.
Plain Text
Source formatTXT files contain unformatted plain text with no styling, images, or layout information. They are universally readable by any device and operating system, making them the simplest document format.
OPML Outline
Target formatOPML (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.
Why convert TXT to OPML
Opening TXT in the tool that natively reads OPML is rarely clean. Converting upstream rebuilds the document in the target format so headings become headings, lists stay lists, and the receiving tool does not flag layout warnings.
HOW TO CONVERT
TXT → OPML
Drop the TXT file
Upload your document — or a ZIP of several documents for batch conversion — through the web form.
Convert through pandoc
Our pandoc-based pipeline opens the TXT, preserves structure and typography, and writes the OPML.
Retrieve the document
Click the download button; the OPML is delivered as a single file (or ZIP of files for batch jobs).
Common Use Cases
Email distribution
Office recipients open OPML in their default reader; TXT may arrive with a missing-font warning or layout shift.
Signing and notarisation
OPML is the standard format for DocuSign, Adobe Sign and notary workflows; TXT usually needs converting first.
Contract handoff
Legal teams exchange contracts as OPML because it preserves formatting and supports digital signatures out of the box.
Form distribution
Fillable forms — tax documents, applications, surveys — live in OPML and work on any platform that reads the format.
TXT vs OPML — Strengths and limitations
What each format does best, and where it falls short.
TXT Strengths
- Universally readable — every operating system, every editor, every programming language.
- Zero metadata overhead: the file size equals the character count (for ASCII).
- Safe to diff, grep, version-control, and pipe through command-line tools.
- Immune to format obsolescence: a text file from 1970 still opens today.
- Tiny footprint for structured data like logs or configuration.
Limitations
- No styling, images, or embedded structure — just characters.
- Character encoding ambiguity (ISO-8859-1 vs UTF-8 vs Windows-1252) causes "mojibake".
- Line-ending differences between OSes still cause subtle bugs today.
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
- 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.
TXT vs OPML — Technical specifications
Side-by-side comparison of the technical details.
| Specification | TXT | OPML |
|---|---|---|
| MIME type | text/plain | text/x-opml |
| Common encodings | UTF-8, UTF-16, ASCII, ISO-8859-1, Windows-1252 | — |
| Line endings | LF (Unix), CRLF (Windows), CR (classic Mac) | — |
| Max file size | Limited only by filesystem (no format-level limit) | — |
| Structure | None — flat sequence of characters | — |
| Extension | — | .opml |
| Format | — | XML with nested <outline> elements |
| Standard | — | OPML 2.0 (2006) |
| Primary use | — | RSS subscription interchange |
TXT vs OPML — Typical file sizes
Approximate file sizes for common scenarios.
TXT
- Short note < 1 KB
- README file 2–20 KB
- Full novel (~90,000 words) 500 KB – 1 MB
- Server log file (daily) 10 MB – 1 GB
OPML
- Typical RSS reader export (50 feeds) 5-30 KB
- Deep outline (Scrivener novel plan) 20-200 KB
Quality & Compatibility
Headings, paragraphs, lists, tables, hyperlinks and inline images all survive the conversion with their semantic structure intact. Rare features unique to TXT — legacy macros, form fields, obscure frame styles — are flattened to static content where no direct OPML equivalent exists. Tracked changes, where both formats support them, transfer cleanly.
Tips for Best Results
- Round-tripping between TXT and OPML (converting back and forth) can accumulate small formatting drift — do one conversion and stay in that format.
- If the TXT has tracked changes, accept or reject them before converting to avoid surprises in the OPML output.
- Very long documents split cleanly at existing section breaks; add section breaks deliberately if you need precise page boundaries.
Frequently Asked Questions
Frequently Asked Questions
Yes, as long as the fonts are standard (system fonts or common office fonts like Arial, Calibri, Times, Helvetica). Custom corporate fonts survive if they are embedded in the source document; otherwise the conversion substitutes the closest available match, which can shift line breaks by a character or two.
Yes. Inline images are embedded into the OPML at full resolution, editable tables become native OPML tables, and hyperlinks keep their URLs. Complex features unique to TXT — macros, form fields, track-changes — are mapped where an equivalent exists in OPML and flattened into static content otherwise.
All uploads go over TLS, files are processed in isolated containers and both the source and the output are deleted within two hours. No account is required, file contents are never indexed or used for training, and the paid plan adds a signable data-processing agreement for regulated workflows.
RELATED CONVERSIONS
Other popular pairs involving TXT or OPML
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Related comparisons
See these formats side by side to understand which fits your use case best.
Related Guides
Secure & Private Conversion
Your files are encrypted during transfer, processed in isolated containers, and automatically deleted within 60 minutes. We never read, share, or store your data.