If you own InDesign CS6 or older, and the file was made in CC 2024, you cannot magically convert the file without some access to a newer machine. Here are two free alternatives:
the file in the version of InDesign it was created in (or any newer version). Cmd/Ctrl + E In the "Format" or "Save as type" dropdown, select InDesign Markup (IDML) how to convert indesign file to older version free
I can provide for your exact version of the software. If you own InDesign CS6 or older, and
Remember: When in doubt, . It is the only free, reliable bridge between versions of InDesign. Keep this guide bookmarked—because that error message will eventually return, and now you know exactly how to defeat it without spending a dime. Remember: When in doubt,
file in your older version of InDesign. It will open as an "Untitled" document, which you can then save as a standard Free Online & Third-Party Alternatives
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