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>> RELS file

RELS file format description

Many people share .rels files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .rels file can be edited, converted or printed with. On this page, we try to provide assistance for handling .rels files.

1 filename extension(s) found in our database.

.rels - Microsoft Office 2007 Relationships

RELS file is a Microsoft Office 2007 Relationships. RELS file describes the relationships that begin the document structure. Called a relationship part.

.rels file format description:
RELS format
Microsoft Office 2007
Document files
- / -
Microsoft Office 2007 Relationships related links:
Microsoft Office 2007 Relationships related extensions:
Microsoft Office 2007 Theme
Microsoft Office SmartArt Color Definitions
Microsoft Office SmartArt Graphics Layout
Microsoft Office SmartArt Styles
Obfuscated OpenType Font
Microsoft Office 2007 Theme

Naturally, other applications may also use the .rels file extension. Even harmful programs can create .rels files. Be especially cautious with .rels files coming from an unknown source!

Can't open a .rels file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .rels file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

els, rel, res

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

EasyLanguage Storage
Abaqus/Standard Restart Data
MSC Patran Element Result
Readme Text
Nokia 5510 Phone Recorded Audio
PLINK Text Relationship Matrix

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