OneNote Integration

Embed and edit OneNote notes directly inside Obsidian through a local COM interface with the OneNote desktop application. No cloud services, no Azure configuration required.

Windows only — this plugin relies on the Win32 OneNote desktop COM API and native window embedding. macOS support is limited to basic sidebar browsing via AppleScript.

Features

• Live window embedding — embeds the actual OneNote desktop window into your note, not a screenshot or iframe
• Sidebar browser — navigate notebooks, sections, and pages in a hierarchical tree view
• Interactive page selector — cascading dropdowns (notebook → section → page) in empty code blocks for quick page selection
• Detach / reattach — toggle any embedded OneNote window between inline and standalone
• Ink content support — detects handwritten pages and extracts InkDrawing / InkPicture preview images
• Rich content parsing — converts OneNote XML to HTML, including text, tables, images, and ink strokes
• Smart occlusion detection — automatically hides the OneNote window when Obsidian modals, the command palette, or hover previews cover the embed area
• HiDPI aware — full coordinate tracking on high-DPI and multi-monitor setups
• Hierarchy caching — 5-minute TTL cache to minimise COM round-trips

Requirements

• Windows with OneNote desktop (Microsoft 365 or Office 2016+)
• Obsidian v1.0.0 or later
• OneNote desktop app must be running before using the plugin

Installation

From Obsidian Community Plugins

Search for OneNote Integration in the Community Plugins browser inside Obsidian and click Install.

Manual installation

1. Build the plugin (see Development below), or download main.js, manifest.json, and styles.css from the latest release
2. Copy them into <vault>/.obsidian/plugins/onenote-integration/
3. Enable OneNote Integration in Obsidian → Settings → Community plugins

Note: On first launch the plugin automatically downloads the two helper executables (onenote-repos.exe, win-embed-overlay.exe) from the GitHub release. No manual compilation is required.

Usage

Browse OneNote content

Click the book icon in the left ribbon, or run Open OneNote view from the command palette.

Embed a OneNote page

Place your cursor where you want the embed and run Insert OneNote embed block, or create a code block manually:

```onenote
```

An interactive selector appears — choose a notebook, section, and page, then click Load Page. The live OneNote window will be embedded into your note.

Specify a page directly

If you already know the page ID:

```onenote
{12345678-ABCD-1234-ABCD-1234567890AB}
My Page Title
```

You can also paste a OneNote URL (the plugin extracts the id or page-id parameter):

```onenote
https://onedrive.live.com/...?id={page-id}
```

Commands

Settings

How it works

Local COM mode

The plugin communicates with the OneNote desktop application through the Windows COM interface. Core operations (navigation, page content retrieval, hierarchy queries) are executed via PowerShell scripts and native C helper programs. macOS provides basic support through AppleScript.

Live window embedding

Rather than using iframes or screenshots, the plugin repositions the actual OneNote window onto the code block using a native C overlay:

1. win-embed-overlay.exe creates a borderless WS_POPUP overlay window composited by DWM for correct z-ordering with Obsidian. It receives real-time coordinate updates over stdin.
2. CoordinateTracker tracks the code block's screen-absolute position using four strategies: ResizeObserver, scroll listeners, MutationObserver, and rAF polling.
3. Occlusion and boundary detection hides the OneNote window when the embed area is covered by Obsidian UI or scrolled out of view.

C helper programs

Both are compiled as standalone single-file executables with no external runtime dependencies.

Development

Prerequisites

• Node.js v16+
• MinGW-w64 (for compiling C helpers locally) or MSVC Build Tools

Build

npm install
npm run build          # TypeScript check + esbuild production build
npm run dev            # Watch mode for development
npm test               # Run tests (vitest)

Compile C helpers (optional)

C helpers are cross-compiled by the CI workflow (MinGW-w64 on Ubuntu). To compile locally:

# MinGW-w64
x86_64-w64-mingw32-gcc -O2 -static repos.c \
  -luser32 -lole32 -loleaut32 -ldwmapi -lpsapi -lshell32 -lshcore -luuid \
  -o onenote-repos.exe
x86_64-w64-mingw32-gcc -O2 -static win-embed-overlay.c \
  -luser32 -lpsapi -ldwmapi -lshcore -o win-embed-overlay.exe

Local test vault

Use npm run build:test to build and copy all artifacts to a sibling test-vault directory.

Release workflow

Publishing is handled by GitHub Actions. The workflow does the following on every version tag:

• installs dependencies on a clean Ubuntu runner
• verifies the Git tag matches manifest.json and package.json
• verifies versions.json contains the current plugin version
• runs the test suite and production build
• cross-compiles onenote-repos.exe and win-embed-overlay.exe with MinGW-w64
• creates a GitHub release with all plugin assets attached

Release a new version with:

# 1. Update versions in manifest.json, package.json, and versions.json
git add manifest.json package.json versions.json
git commit -m "Release v1.3.2"
git push origin master

# 2. Push a matching version tag
git tag v1.3.2
git push origin v1.3.2

The generated release uploads:

• main.js
• manifest.json
• styles.css
• versions.json
• onenote-repos.exe
• win-embed-overlay.exe

Tech stack

• TypeScript — plugin body
• C — native window manipulation helpers
• PowerShell — COM interface calls
• esbuild — fast bundler (CJS, browser target)
• vitest — unit tests
• Obsidian Plugin API — plugin framework
• Windows COM / DWM — window embedding and compositing

Known limitations

• ~1 frame latency — a GPU compositor vs native window movement offset of ~16 ms @ 60 fps is inherent to the Windows DWM architecture
• macOS is basic only — sidebar browsing works; live window embedding is not supported
• Handwritten notes — OneNote InkDrawing ISF binaries cannot render in a browser; the plugin attempts to extract companion preview images but not all ink content has one
• Single embed — only one active embedding session at a time

License

MIT