Notesnook supports importing from most of the popular note apps and common export formats such as markdown, html and text files.
You can try out the importer by opening the web or desktop app and going to Settings > Notesnook Importer
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Don’t see your notes app? No worries, create an issue on Github
Not a single byte of your data from other apps is sent to our servers. Everything is processed 100% on the client side inside this browser.