Strata is a native macOS outliner for writing, thinking, planning, and restructuring ideas quickly. It is inspired by tools like Workflowy, but built as a document-based Mac app with OPML files, native windows, native tabs, and standard keyboard shortcuts.
- Open and save regular
.opmldocuments. - Keep multiple documents open in native macOS tabs.
- Focus on any node and navigate back with breadcrumbs.
- Select one or many nodes with keyboard or mouse.
- Copy, cut, paste, delete, complete, merge, reorder, indent, outdent, and drag selected nodes.
- Use rich inline formatting: bold, italic, highlight, and URL links.
- Type Markdown-like shortcuts such as
**bold**,*italic*, and==highlight==; Strata converts them to rich text and removes the markers. - Hide completed items from the View menu.
- Search the current outline.
- Export as plain text, Markdown, or HTML.
Download the latest build from GitHub Releases.
Strata currently targets macOS 26 and later.
Strata is not signed with a paid Apple Developer account yet. macOS Gatekeeper may block it the first time you open it.
If macOS says the app cannot be opened:
- Open System Settings.
- Go to Privacy & Security.
- Scroll to the security message about Strata.
- Click Open Anyway.
You can also Control-click Strata.app, choose Open, then confirm that you want to open it.
Strata uses OPML as its primary file format. It stores Strata-specific state using custom OPML attributes:
_complete="true"for completed nodes._collapsed="true"for collapsed branches._strata_formatting="..."for rich-text formatting and links._note="..."for node notes.
Other OPML apps should still be able to read the outline text, though they may ignore Strata-specific metadata.
Requirements:
- macOS 26 or later
- Xcode with the macOS 26 SDK
Build a release app:
xcodebuild -project Strata.xcodeproj -scheme Strata -configuration Release -derivedDataPath build/DerivedData buildThe built app will be at:
build/DerivedData/Build/Products/Release/Strata.appStrata is early software. Core outlining behavior is in place, but polish and native document behavior are still being refined.