Outliner

What it does

Client side

The maker says everything runs client side in a modern browser.checked 11 Oct 2026

Collapse and expand

The toolbar includes controls to collapse all nodes or expand all nodes.checked 11 Oct 2026

Editing

It supports keyboard driven editing, collapse and expand, hoisting, drag reordering, and localStorage persistence.checked 11 Oct 2026

Feeds

The toolbar includes an option to add a feed.checked 11 Oct 2026

Hoisting

The app can hoist a node to focus on its subtree, with a control to dehoist.checked 11 Oct 2026

Import and export

Import and export preserve node attributes, and the maker says the app is compatible with files from Drummer and Frontier.checked 11 Oct 2026

Includes

The toolbar includes an option to add an include.checked 11 Oct 2026

Inspector

The app includes an Inspector for viewing node attributes.checked 11 Oct 2026

Intended use

The maker describes use for building subscription lists and composing OPML files from other OPML files.checked 11 Oct 2026

Keyboard shortcuts

The page lists Tab and Shift-Tab for indentation and Alt plus the up or down arrow for moving nodes.checked 11 Oct 2026

License

The project is licensed under the MIT License, with copyright credited to Andy Sylvester in 2026.checked 11 Oct 2026

Mobile use

The maker reports testing the app with Android tablet and Google Chrome and says phone editing still needed updates.checked 11 Oct 2026

OPML files

The app provides controls to import and export OPML files.checked 11 Oct 2026

OPML inclusion

Add include links to another OPML file, which can be expanded inline as a read only live view.checked 11 Oct 2026

Purpose

Outliner is a web-based tool for creating and editing outlines.checked 11 Oct 2026

Read-only

The toolbar displays a read-only control.checked 11 Oct 2026

Read only viewing

A URL parameter can open a public OPML file in read only mode, and the page says it can still be exported.checked 11 Oct 2026

Reordering

Outline nodes can be indented, outdented, and moved up or down.checked 11 Oct 2026

Security

The opened maker pages do not state security certifications or compliance claims.checked 11 Oct 2026

Setup

The maker says it needs no build step, server, or dependencies; open the HTML file to use it.checked 11 Oct 2026

Version

The page identifies the app as version 0.6.0.checked 11 Oct 2026