Open .opml Files Online — Free OPML Viewer
Open OPML File Online — Free & Instant
No signup required. Works in your browser.
📁 Drag & drop your file here
or click to browse • Max 100MB
✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install
What Is a .opml File?
A .opml file is a document format known as OPML. Outline Processor Markup This format is created by Dave Winer and is widely used by writers, students, and office workers.
OPML files contain structured document data that requires compatible software to open. With OpenAnyFile, you can read and annotate .opml files directly in your browser without installing any software.
How to Open .opml Files Online
- Visit OpenAnyFile OPML page
- Drag and drop your .opml file onto the upload area, or click "Browse" to select it
- OpenAnyFile automatically detects the OPML format using magic byte analysis
- View, analyze, and read and annotate your file contents in the browser
- Optionally convert to XML, JSON, HTML or download
Software That Opens .opml Files
.opml files are primarily created by Dave Winer. In the document space, you may encounter .opml files from third-party tools, online converters, or export functions. Regardless of the source, OpenAnyFile handles them all.
Open .opml on Different Platforms
- Windows: Use the original software or upload to OpenAnyFile for instant access
- macOS: Preview may not support .opml — use OpenAnyFile as a universal viewer
- Linux: Open-source alternatives exist, or use OpenAnyFile in any browser
- Mobile (iPhone/Android): OpenAnyFile works on all mobile browsers
Common .opml File Problems
Schema validation
Other common issues include: your OS not recognizing the file extension, the file appearing corrupted after download, or lacking the required software. OpenAnyFile bypasses all these issues with universal format detection.
Convert OPML to Other Formats
OPML files can be converted to 3 formats including XML, JSON, HTML.
Related Document Formats
If you work with .opml files, you may also encounter these document formats:
- ABW (.abw) — Open & convert .abw files online
- ANKI (.apkg) — Open & convert .apkg files online
- AsciiDoc (adoc) — Open & convert adoc files online
- ASCIIDOC (.adoc) — Open & convert .adoc files online
- AZW3 (.azw3) — Open & convert .azw3 files online
- BIB (.bib) — Open & convert .bib files online
- BibTeX (bib) — Open & convert bib files online
- CALIBRE (.calibre) — Open & convert .calibre files online
- CB7 (.cb7) — Open & convert .cb7 files online
- CBR (.cbr) — Open & convert .cbr files online
Popular OPML Conversions
Frequently Asked Questions
What is a .opml file?
A .opml file is a document format called OPML. Outline Processor Markup
How do I open a .opml file without installing software?
Upload your .opml file to OpenAnyFile. Our browser-based tool instantly detects and displays it — no downloads needed.
What program creates .opml files?
.opml files are typically created by Dave Winer.
Can I convert .opml to another format?
Yes. OpenAnyFile converts .opml to XML, JSON, HTML.
Is it safe to open .opml files online?
Yes. OpenAnyFile processes files in a secure, isolated environment. Files are automatically deleted and all transfers use HTTPS.
Can I open .opml on my phone?
Yes. OpenAnyFile works on all mobile browsers including iPhone and Android.