What to Know
- An INDD file is an Adobe InDesign document.
- Open one for free with Photopea, or use InDesign or QuarkXPress.
- Convert one to PDF, IDML, PSD, etc., with those apps and others.
This article explains what an INDD file is and how to open and convert one.
What Is an INDD File?
A file with the INDD file extension is an InDesign document that's most commonly created by and used in Adobe InDesign. The file stores page content, formatting information, files, and more.
InDesign uses these files when producing newspapers, books, brochures, and other professional layouts.
Some InDesign Document files may use just three letters in the file extension, as .IND, but they're still in the same format.
InDesign Lock files (.IDLK) are automatically generated when INDD files are being used in InDesign.
How to Open an INDD File
Adobe InDesign is the primary software used to work with INDD files. However, you can also view one with Adobe InCopy andQuarkXPress (you might also need the ID2Q plugin).
Photopea is a free tool that lets you open INDD files without InDesign.
InDesign also supports InDesign templates (INDT) and books (INDB), QuarkXPress formats (QXD and QXT), and other InDesign formats like INDP, INDL, and IDAP. You can also use a JOBOPTIONS file with this program.
How to Convert an INDD File
Using an INDD viewer or editor from above will let you convert the INDD file to another format, but as you'll see below, some conversions require a bit more work.
The most common file type to convert an INDD file to is PDF. Photopea and InDesign can do that.
Also within InDesign, under the File > Export menu, is the option to export the file to JPG, EPS, EPUB, SWF, FLA, HTML, XML, and IDML. Change the "Save as type" option to pick the export format.
If you're converting INDD to JPG, you'll see that there are some custom options you can pick from like whether to export just a selection or the entire document. You can also change the image quality and resolution.
You can also convert the INDD file to a Microsoft Word format like DOC or DOCX, but the formatting differences will likely make the result look a bit off. However, if you want to do this, you should first export the INDD to PDF, then plug that into a PDF to Word converter to finish the conversion.
InDesign doesn't have a specific INDD to PPTX export option for using the document with PowerPoint. However, similar to how it works to use the file with Word, start by exporting it to PDF. Then, open the PDF file with Adobe Acrobat and use the File > Save As Other option to convert it to a PPTX file.
If you need the PPTX file to be in a different MS PowerPoint format like PPT, use PowerPoint itself or a free document converter.
iXentric SaveBack converts INDD to IDML if you need to use the file in InDesign CS4 and newer. IDML files are ZIP-compressed Adobe InDesign markup language files that use XML to represent the document. This service works online, but it isn't free.
If you're on a Mac, the file can be converted to PSD for use in Adobe Photoshop. However, you can't do this with InDesign or any of the other programs mentioned above. See How to Save InDesign Files as Layered Photoshop Files for information on a Mac script that can make this happen.
Still Can't Open the File?
If none of the programs mentioned above let you open the file you have, it's possible that it's in a different format and just looks like an INDD file.
For example, PDD and IDX share some of the same file extension letters but they're in entirely different file formats. Just because they appear similar to INDD doesn't necessarily mean that they can be opened with the same programs.
Many other examples could be given but the idea is the same: make sure the file extension actually reads as "INDD" and not just something that looks similar or shares some of the same characters.
If you don't have an INDD file, research the real extension for your file to learn more about its format and the program you need to open it.
FAQ
How do I export an INDD file with images and fonts?
In InDesign, go to File > Package, then select Fonts and Links and Images on the left side of the dialog box to check if anything is missing. Before sending an INDD file, make sure all of the fonts and images are packaged, or the file won't print correctly. When you're ready, select Package.
How do you save each page of an INDD as a separate file?
In InDesign, go to File > Export > PDF and select Create Separate PDF Files. Under the Suffix section, choose what to add to each file name (for example, page numbers).
Can I open an INDD file in Photoshop?
No. You must first convert the INDD file to PDF with InDesign, or PSD with Photopea. After converting it, open it in Photoshop.
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