.ICML File Extension

InCopy Document

Developer Adobe Systems
2.8  |  9 Votes
Category Page Layout Files
Format Binary

What is an ICML file?

An ICML file is a document created by InCopy, a professional writing and editing program. It is saved in the InCopy Markup Language (ICML) format based on the XML standard. ICML files contain document text, graphics, and page layout settings.

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Screenshot of a .icml file in Adobe InCopy 2022
ICML file open in Adobe InCopy 2022

Adobe developed the ICML format for Creative Suite 4 (CS4) and released it in 2003. Previous versions of InCopy (CS3 and earlier) saved documents as .INCX files. ICML is the primary file type associated with InCopy and is a working document, which means users can save the file, close it, then re-open it to continue editing it.

Users may also utilize ICML files to link portions of an Adobe InDesign document (.INDD file) via a network fileserver. For example, InDesign users can link a subset, such as a text or graphics frame, of an INDD file to one or more ICML files and grant them editing permissions using an .ICMA assignment file. Once a user edits the ICML files, InDesign automatically updates the content in the document.

Users typically do not directly open ICML files linked to an ICMA assignment file. When users "edit" an ICMA assignment file, they are actually modifying ICML files behind the scenes using InCopy.

How to open an ICML file

You can open ICML files with Adobe InCopy in Windows and macOS. To open it with InCopy, select File → Open... or double-click the file if it is associated with InCopy. You can also open ICML files with Adobe InDesign.

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Programs that open ICML files

Updated December 30, 2021

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