What is Tangent Notes?

Updated

Tangent Notes is a free, open-source note-taking app for Mac, Windows, and Linux built around linked notes and branching thought paths. It suits people who think associatively—jumping from one idea to a related one—and who want their notes stored as plain Markdown files they fully control. It is not a cloud-first workspace or a task manager; it is a local writing tool for following a train of thought.

Core design: writing the way you think

Tangent's premise is that thoughts are connected, so the app makes linking central rather than incidental. As you write, you can link to existing notes or create new ones on the spot, letting a session move along "the path of interest" instead of forcing you to finish one note before starting another.

Two interface ideas support this:

  • Sliding panels show the sequence of notes you have moved through, so the trail of your thinking stays visible.
  • A branching map builds itself as you write, giving a spatial view of how notes connect.

The practical benefit is orientation: when you follow a tangent three or four notes deep, you can still see where you are and how you got there. That is the problem the app is explicitly designed to solve.

Your notes are plain files on your device

Tangent works directly with local files. Notes are stored as Markdown, which means:

  • Any text editor can open and edit them.
  • Nothing is locked inside a proprietary database.
  • You can back them up, sync them, or move them with ordinary file tools.

This matters if you have been burned by an app that made export difficult or changed its terms. Markdown is a durable, portable format, and local storage means the files are yours to manage. The trade-off is that syncing across devices is your responsibility rather than a built-in service—the source material describes local files, not a hosted sync feature.

Licensing and cost

Tangent is open source under the Apache 2.0 license, with source code published on GitHub. The site describes it as "free forever." Because it is open source, you can inspect the code, and the project's development is publicly visible.

Who it fits—and who it doesn't

Your priority Tangent is a good fit if… Look elsewhere if…
Following linked trains of thought You want fast linking and a visible path through notes You need a rigid folder hierarchy as the primary structure
Data ownership You want plain Markdown files on your own disk You want automatic cloud sync out of the box
Cost You want a free, open-source tool You need paid support or a managed service
Platform You use Mac, Windows, or Linux You need a mobile app (not mentioned in the source material)
Note type You write prose and ideas You need databases, tasks, or team collaboration

Getting started

  1. Go to tangentnotes.com and choose the download for your platform (Mac, Windows, or Linux).
  2. Install and open the app, then create or point it at a folder for your Markdown notes.
  3. Write a note and link to another one; create a new note from within the current one when a tangent arises.
  4. Use the sliding panels and branching map to retrace and navigate your path.
  5. Verify your files by opening the notes folder in any text editor—you should see plain Markdown.

A common adjustment for new users: resist the urge to organize first. Tangent rewards writing and linking as you go, with structure emerging from the connections rather than being imposed beforehand.