Save for older versions with .idml

How to Save an InDesign File for Older Versions (IDML)

Did you know? InDesign files aren't backward compatible by default - a .indd file saved in InDesign 2024 simply won't open in InDesign CC 2019. But there's a simple workaround: export as IDML.

What is IDML?

IDML (InDesign Markup Language) is an open, XML-based file format that acts as a universal bridge between InDesign versions. Any version of InDesign from CS4 onwards can open an IDML file - making it the go-to format when collaborating with colleagues or clients on older software.

But backward compatibility is only half the story. IDML is also one of the most reliable ways to recover a corrupted InDesign file. Because IDML is XML-based rather than binary, exporting a damaged .indd to IDML and then reopening it often strips out the corruption that's causing crashes, freezes, or "cannot be opened" errors - even when other recovery methods fail. Many InDesign users keep this trick in their back pocket specifically for emergencies, not just version-hopping.

How to Export an IDML File

1. Open your document in InDesign.

2. Go to File → Save As Or.

3. In the Format dropdown (Mac) or Save as type dropdown (Windows), select InDesign CS4 or later (IDML).

4. Name your file and choose a save location.

5. Click Save.

That's it! You'll now have a .idml file alongside your original .indd - share the IDML version with anyone on an older version, or use it as a clean rebuild if your original file starts acting up.

Note: As an alternate, you can also go to File → Export → IDML

What to Watch Out For

• Some newer features may not translate perfectly. Effects, paragraph styles, or objects using features introduced after CS4 may appear differently or be flattened when the IDML is opened in an older version.

• IDML is not a replacement for your working file. Think of it as a "compatibility export," not your primary save format.

• Check your links before exporting. Broken links in your .indd will carry over into the IDML.

• If you're exporting to recover a corrupted file, try it even if the .indd won't open normally - IDML export/reimport can sometimes succeed where a direct open fails, since it forces InDesign to rebuild the file's internal structure from scratch.

Quick Recap

Have questions or run into issues with your IDML export? Drop them in the comments below - the community is here to help!