Open Notepea while connected
Open Notepea and wait for the offline-ready message. You can then continue using the app in the same browser when you lose your connection. Some help pages still need an internet connection.
Find your notes again
Return using the same browser and device. A private window or a different browser has separate storage, so it will not show the same notes.
Keep a backup
Notes stay on your device and do not sync automatically. Export a backup before clearing browser data, changing devices or reinstalling your browser.