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INDD IDML
File conversion

Convert INDD to IDML

Verified by Adam B.· reviewed by FE Editorial ·updated Aug 14, 2026
QUICK ANSWER
Is it possible to convert INDD to IDML?
Yes - INDD converts to IDML.

In Adobe InDesign, go to File > Save As, select InDesign Markup (IDML) from the format dropdown, and save. Without InDesign, IDMarkz (paid, Windows and macOS) is the only desktop tool that converts INDD to IDML without an InDesign installation.

2 programs
Also to IDML: AFBOOK · QXP · QXD

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert INDD to IDML?

INDD files are version-sensitive - a file saved in a newer InDesign version cannot be opened in an older one. IDML is Adobe's documented interchange format, backward-compatible across several InDesign versions and readable by Affinity Publisher and QuarkXPress, making it the standard handoff format when collaborating across different DTP applications or InDesign versions.

How to convert INDD to IDML

Adobe InDesign APP

Go to File > Save As, choose InDesign Markup (IDML) from the format dropdown, name the file, and save - the resulting .idml is a ZIP-based XML package.

Adobe InDesign for Mac APP

Go to File > Save As, choose InDesign Markup (IDML) from the format dropdown, name the file, and save.

IDMarkz APP

Drag your .indd file onto the IDMarkz window, choose Export to IDML, select an output folder, and click Export - no InDesign installation required.

Programs that convert INDD

Adobe InDesign
Adobe InDesign for Mac

About these formats

.INDD Adobe InDesign Document

An INDD file is the working document of Adobe InDesign, used for professional page layouts such as magazines, books, brochures, and flyers. It opens properly only in Adobe InDesign (paid…

Open .INDD details →
.IDML Adobe InDesign Markup Language

An IDML file is an Adobe InDesign page layout saved in InDesign Markup Language, an open XML-based interchange format introduced in 2008. Open it in Adobe InDesign (File → Open, then save…

Open .IDML details →

Quality & what to watch

  • IDML strips some data: scripted or plugin-generated content, certain complex blending modes, and tracked changes may not be preserved.
  • Linked images are not embedded in IDML; when handing off the file, package the INDD (File > Package in InDesign) so images and fonts are included alongside the IDML.
  • The .idml file is a ZIP archive of XML files and can be opened in older InDesign versions and imported by Affinity Publisher and QuarkXPress.

Frequently asked questions

Can I open IDML in older versions of InDesign?
Yes - IDML is backward-compatible across several InDesign versions and is the correct format for sharing with users on older releases.
Does Affinity Publisher support IDML?
Yes - Affinity Publisher can import IDML files, making it a useful handoff format when switching between InDesign and Affinity Publisher.
Is anything lost when saving to IDML?
Minor data loss can occur: plugin-generated content, some complex blending modes, and tracked changes may not be preserved, though for typical layouts differences are minor.