Converting to IDML and back to INDD often "cleans" a corrupted file.
A true full INDD → IDML converter should preserve: online converter indd to idml full
: A batch-conversion tool that can process multiple InDesign files into IDML format simultaneously. Convert INDD to IDML with InDesign Easy 1-Minute Tutorial Converting to IDML and back to INDD often
Converting files to IDML (InDesign Markup Language) is essential for opening newer files in older versions of Adobe InDesign or for use in third-party software like Affinity Publisher . online converter indd to idml full