This is mine! https://codepad.co/snippet/XxFu3CXs

No hosting needed, just save the location string as bookmark!!
[ctrl+shift+t] -or- [⌘+shift+t] to restore data

Features:

• autosave every 10 seconds after any non-special-key pressed
• last modification date and time
• title
• * added to document title while data is not saved
• dynamic document.title
• favicon
• markdown support
• download document as text
• download document as .html from with markdown formatting
• trash document
• handles correctly copy/paste text from other sources
• nice style