Scratchpad is a PWA to store notes. Notes can be written in Markdown.
Notes will be stored on your device, in browser’s local storage. No data will be stored online. However, keep in mind that flushing your browser’s site preferences will remove your notes.
That application is free and open source. It’s not a commercial product, only a « scratch your own itch » app. Code is available on github.
If you’re concerned about privacy and security, I encourage you to host the app yourself by cloning the project on a web server.
More about my projects and contact informations on paulgreg.me.