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 Data

The RELS document files are related to Microsoft Office 2007. The RELS file is a Microsoft Office 2007 Relationships. RELS file describes the relationships that begin the document structure. Called a relationship part.

Microsoft Office 2007
Document files
- / -
Microsoft Office 2007 Relationships Data related extensions:
Microsoft Excel Chart File
Luratech Portable Document
GravoStyle Design Document
PFS First Choice Spreadsheet
Timed Text Markup Language Document
Adobe Premiere 6 Library Data

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, rls, rsls

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

PDP-10 Relocatable Object
Delphi Resource Data
Nokia 5510 Phone Recorded Audio
Steam Client Resource Data
Qualitek-4 Results Data
Norton Internet Security Log

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8/10, Windows 11, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, macOS, Mac OS X, iOS, Android

If you find the information on this page useful, please feel free to link to this page.

If you have useful information about the .rels file format, then write to us! >> RELS file