ER1 File Type

- The quick facts

What are ER1 files and how to open them

Are you having problems opening an ER1 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 an ER1 file?

An .ER1 file is an AllFusion ERwin data file.

We have not yet analyzed in detail what these files contain and what they are used for. We're working on it.

How to open ER1 files

Important: Different programs may use files with the ER1 file extension for different purposes, so unless you are sure which format your ER1 file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 2 different ER1 openers which you will find listed below.

Last updated: June 4, 2012

Suggest another file format using extension ER1

While we know of one file format using the .ER1 file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .ER1 file.

Various apps that use files with this extension

These apps are known to open certain types of ER1 files. Remember, different programs may use ER1 files for different purposes, so you may need to try out a few of them to be able to open your specific file.

ERwinERwinUser submitted
PLATINUM ERwinPLATINUM ERwinUser submitted