What are RELS files and how to open them

Are you having problems opening a RELS file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a RELS file?

A .RELS file is an Open Office XML Relationships file.

Files that contain the .rels file extension are relationship files. These files contain information about how the parts of different Microsoft Office documents fit together. This information is also referred to as relationship parts.

RELS files serve as markers for the documents that they pertain to. They allow the various Microsoft Office applications to utilize the information in one file to be used in another file.

The RELS file format is only compatible with the more recent versions of the Microsoft Office applications, which support Open Office XML documents. The RELS files are saved in the directory of the Open Office XML document.

How to open RELS files

We have identified 2 RELS openers that are compatible with this specific type of RELS file.

Programs that open Open Office XML Relationships files

Last updated: November 30, 2022

Various apps that use files with this extension

These apps are known to open certain types of RELS files. Remember, different programs may use RELS files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Microsoft PowerPoint ViewerMicrosoft PowerPoint ViewerVerified
Adobe DreamweaverAdobe DreamweaverUser submitted
Macromedia Dreamweaver MXMacromedia Dreamweaver MXUser submitted
BrowserBrowserUser submitted
Aptana StudioAptana StudioUser submitted
T-Online BrowserT-Online BrowserUser submitted
Macromedia DreamweaverMacromedia DreamweaverUser submitted
Microsoft OfficeMicrosoft OfficeUser submitted
Instant AccessInstant AccessUser submitted
Microsoft Application VirtualizationMicrosoft Application VirtualizationUser submitted

Help us help others helps thousands of users every day, and we would love to hear from you if you have additional information about RELS file formats, example files, or compatible programs. Please use the links below or email us at to discuss further.