Go to File > Export (or File > Save As in some older versions). Change the Save as type (Windows) or Format (Mac) to InDesign Markup Language (IDML) .
Report prepared for general design and publishing workflows. Last reviewed: 2026. how to convert indesign file to older version link
To send your file into the past, follow these steps: Go to File > Export (or File >
"Cannot open IDML – file is corrupt"
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