Mimiri Notes

People who take notes containing private information, confidential data, or credentials need a way to store and organize them that keeps that data safe from prying eyes, including the note app provider itself, servers, and ISPs. Sharing such notes with trusted collaborators like family, friends, or coworkers is often insecure or complicated, and users typically must choose between usability and privacy. Many note apps also lack robust protections against accidental deletion, accidental edits, or exposure via screen sharing and onlookers. Users also want access to their notes across multiple devices and offline, without losing data if a company's servers disappear.

Mimiri Notes is an open-source (GPLv2) note-taking application that encrypts all data with AES-GCM-256 on the device before it ever leaves, so neither Mimiri, its servers, nor ISPs can read user data. Notes are organized in a nested tree structure where any note can contain both data and sub-notes, with search to quickly narrow down results. Users can share a single note or a branch of notes with multiple trusted people through end-to-end encrypted sharing, with changes automatically synchronized among participants who alone can decrypt the shared data. The app provides unlimited version history, a Recycle Bin for deleted notes, local device copies for offline access, real-time cloud sync across Windows, macOS, Linux, iOS, Android, and web browsers, and privacy features like hiding the app from screen sharing and hiding passwords from plain view.