The notepad online is a free text editor app designed to write, save, and print quick notes within a web browser.
Notepad's text is saved in a temporary cache that may be deleted when you clear your browsing history/cache or run a disk-cleaning application.
Use Autosave feature to save the text in your 'Downloads' folder.
Your notes will not be stored to the browser's cache if you use Notepad with an Incognito/Private window!