You cannot convert whole InDesign books (.indb) to a single IDML file, the program doesn't support this function. At best, you can convert (export) individual files from .indb files and save each of them in a separate .idml file. This can of course only be done using InDesign itself, as no other software is capable of this conversion.
Convert Adobe InDesign publication to InDesign Markup Language document.
We have found 2 software records in our database eligible for .indb to .idml file format conversion.
Microsoft Windows software - convert indb to idml on Windows
A popular software for designing, preflighting and publishing documents for print, online, or to mobile devices. In InDesign graphic designers can create posters, flyers, brochures, books etc.
InDesign also supports export to digital SWF Flash format and EPUB format. Adobe InDesign is the successor to Adobe PageMaker. Adobe InDesign is distributed independently or as a part of some Adobe Creative Suite and Creative Cloud editions.
The latest version, Adobe InDesign CC is available through the new Adobe Creative Cloud subscription service. The previous version was InDesign CS6.
Convert from indb file
to idml file
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned indb to idml. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert indb to idml on OS X
Adobe InDesign is popular application used to design documents, such as flyers, posters, brochures, magazines, books etc.. Adobe InDesign also supports export to EPUB and SWF formats to create electronic publications for mobile platforms. InDesign is distributed as a stand-alone application, or as a part of Adobe Creative Suite.
The latest version, InDesign CC is available through the new Adobe Creative Cloud. The previous version was InDesign CS6.