What is a .indd file?
Adobe InDesign Document · Design · Adobe · 1999
An .indd file is an Adobe InDesign document, the working file of the industry-standard page-layout program. It holds the full layout of a magazine, book or brochure, with text, images and typography.
What is a .indd file used for?
InDesign is used for print and digital publishing, so .indd files carry precise multi-page layouts. The format is proprietary and version-specific: a document saved in a newer InDesign may not open in an older one.
To share a layout with people who lack InDesign, export to PDF. For editing on an older version, save as IDML, InDesign's interchange format.
How to open a .indd file
The .indd format opens in the following apps, grouped by operating system. If one app does not work, try another from the same list. For a step-by-step walkthrough, see how to open a .indd file.
Windows
- Adobe InDesign
- convert to PDF/IDML
macOS
- Adobe InDesign
- convert to PDF/IDML
Linux
- No native option; use PDF export
How to convert a .indd file
You can convert a .indd file to pdf, idml, epub using a conversion tool or the export menu of an app that opens it.
.indd file signature (magic bytes)
Programs recognise a .indd file by the bytes at the start of the file, not by its name. These are the signatures for InDesign.
| Hex signature | Offset | Note |
|---|---|---|
| (no fixed signature) | 0 | proprietary; no publicly documented fixed signature |
See the full magic-numbers reference for every format.
Frequently asked questions
What is a .indd file?
An .indd file is an Adobe InDesign document, the working file of the industry-standard page-layout program. It holds the full layout of a magazine, book or brochure, with text, images and typography.
How do I open an .indd file without InDesign?
There is no full free viewer. Ask for a PDF export to view the layout, or an IDML file to edit it in a compatible program.
Why won't my .indd file open?
Usually a version mismatch: files from a newer InDesign will not open in an older one. Have it saved down to IDML, or to your version.
How do I convert InDesign to PDF?
In InDesign, use File then Export and choose Adobe PDF. That produces a shareable file anyone can open.
Related formats
Sources
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