Open OOUTLINE files in your browser
The outlines OmniOutliner keeps on a Mac, an iPhone or an iPad, sent to someone with none of them. Open one right here, row by row. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your outline opens row by row as it nests, each row with its note, checkbox and other columns.
- Every row as it nests • Fold and unfold
- Each row's other columns beside it
- Filter • Keep the rows that match
- Export • Save as OPML, Markdown or FreeMind
About OOUTLINE
OmniOutliner is The Omni Group's outliner for the Mac, iPhone and iPad, where people plan, keep lists and draft in rows inside rows with columns beside them. It's only for Apple's devices, so its files reach Windows, Android and Linux with nothing there to open them.
OmniOutliner 5 and 6 save .ooutline files, and OmniOutliner 3 and 4 saved .oo3, each a package the Mac zips when it's sent, or a single file. Inside, contents.xml holds the outline's columns, then each row with its values, its note and its checkbox, OmniOutliner 3's rows inside rows and later ones each naming the row it's under.
Filepeek shows the outline as rows that fold as they nest, each with its checkbox, its note and the values of its other columns. Filter keeps the rows that match, and Export saves it as OPML, Markdown or FreeMind's MM.
OmniOutliner outline
.ooutline • .oo3
Format
- MIME type
- application/octet-stream
- Made by
- OmniOutliner, by The Omni Group
Inside the file
- Holds
- Rows inside rows
- Each row
- Notes, checkboxes and columns
- Format
- A package with XML
- Made by
- OmniOutliner 3 to 6
Opens in every browser
Filepeek opens OmniOutliner files in Chrome, Edge, Firefox and Safari, as the ZIP a Mac makes or as the package itself. On their own, browsers download them.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Apps that open OOUTLINE
- WindowsNo app opens it
- MacOmniOutliner, paid
- iPhone and iPadOmniOutliner for iPhone and iPad, paid
- AndroidNo app opens it
Questions
How do I open an OmniOutliner file on Windows?
Drop it on this page or press Peek an OOUTLINE. The outline opens in your browser, on Windows, Android or Linux, with nothing to install.
Does an old .oo3 file open too?
Yes. Files from OmniOutliner 3 and 4 open the same way as OmniOutliner 5's and 6's.
Does it keep my styles?
No. Rows show in the site's own look, with their text, notes, checkboxes and columns, without the fonts and colors of their styles.
Can I turn an outline into Markdown?
Yes. Choose Export, then Save the outline as Markdown, its checkboxes as [x] and [ ], or as OPML for another outliner.