Whilst you can repack debian archives (.deb) to other formats, including .appimage files, it won't make the package useable in different OS platform form app installation purposes. You have to look for installer of your app for your particular platform.
Home > Search converters: deb to appimage
Conversion of deb file format to appimage file format beta
Search for deb to appimage converter or software able to handle these file types.
Convert Debian Linux package to Application portable image.
We have found one software suitable in our database for this conversion.
Linux/Unix software 
- convert deb to appimage on Linux
Debian
Operating system based on the Linux and FreeBSD kernels
File extension | Convert | Open | Save | Edit | Create | Import | Export | Extract |
|---|---|---|---|---|---|---|---|---|
Convert from deb file | No | Yes | No | No | Yes | No | No | Yes |
| No | Yes | No | No | Yes | No | No | No |
The table with program actions contains information about what each program is capable of doing with their files. This may be a good pointer for further searches for certain file conversions and help you find the converter you are looking for if our search result is insufficient for you. However, it is far from perfect and may sometimes show results which are not really usable because of the nature of the software handles the files. So a conversion that appears as possible, just because of matched actions, may in fact not be possible.
Additional links: Open deb file, Open appimage file
DEB
Files with deb extension can be mainly found as Debian distribution packages - compressed archives for Debian Linux operating system. Some archiving utilities, such as 7-zip, are also able to extract the content of DEB packages.
APPIMAGE
Files with appimage extension are related to image format used to distribute portable apps for Linux-based operating systems.
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