What is a NOTE file?
A .NOTE file is a digital note. Many different applications create these files to store text, drawings, audio, and images. Because multiple programs use the .NOTE extension, the exact structure of your file depends on the software that created it. For example, it might be an Apple Notes data file, a Samsung Notes file, or a document from a Supernote e-ink tablet. It is also common to see the Notability Note File created by Ginger Labs. Other programs like Tomboy use the .NOTE extension to store note data in an XML format.
How to open NOTE files?
Because the .NOTE extension has multiple possible meanings, you must know which program created the file to open it on your computer. If it is a Notability Note File, you need the Notability app. If it is from Supernote, you need their specific cloud platform or companion app. If you do not know the origin of your file, viewer.online/note analyzes .NOTE files to identify their exact format and creator software, shows which programs can open the file, and usually previews it.
Software and tools
You can use command-line tools like file or binwalk to inspect the internal structure of a .NOTE file. Many of these files are simply compressed folders. If a .NOTE file is an archive, you can rename the extension to .ZIP and extract the contents using 7-Zip or WinRAR.
Summary
There is no single standard for .NOTE files. However, because many .NOTE files use the known ZIP format, viewer.online/note can safely open and display them online, eliminating compatibility problems.