since 2000
All about ER Files
The ER file type is primarily associated with ERMaster.
What is an ER file?
ER files mostly belong to ERMaster. ER files are not a single standard format. They can store very different data depending on the program that created them.
For example, one type of ER file is used by Nintendo DS games. This file may contain information for a level in New Super Mario Bros. and can include audio data. It is handled by game editors or specialized tools from companies like Nitro Studio.
Other ER files hold Entity Relationship diagrams. In this case the file stores a data model that shows relationships between database tables. Some of these files use JSON formatting, and they are opened with modeling tools such as ERMaster, ERwin Data Modeler, ER Assistant or Erwiz. More details about the ER diagram tools are available at the ERMaster project page.
Additional uses include:An encrypted ZIP container holding embroidery design files A TestExecutive report produced by National Instruments software (NI website) FilExt.com tip: This file’s purpose and functionality depend on its origin. To view an ER file, use the specific application associated with the file’s use—be it a game level editor, an ER diagram tool, or another dedicated program.
For example, one type of ER file is used by Nintendo DS games. This file may contain information for a level in New Super Mario Bros. and can include audio data. It is handled by game editors or specialized tools from companies like Nitro Studio.
Other ER files hold Entity Relationship diagrams. In this case the file stores a data model that shows relationships between database tables. Some of these files use JSON formatting, and they are opened with modeling tools such as ERMaster, ERwin Data Modeler, ER Assistant or Erwiz. More details about the ER diagram tools are available at the ERMaster project page.
Additional uses include:
How to open ER files
You need a suitable software like ERMaster to open an ER file. Without proper software you will receive a Windows message "How do you want to open this file?" or "Windows cannot open this file" or a similar Mac/iPhone/Android alert. If you cannot open your ER file correctly, try to right-click or long-press the file. Then click "Open with" and choose an application. You can also display a ER file directly in the browser:. Just drag the file onto this browser window and drop it.
Online ER Text Viewer
or drag and drop it here
Read our privacy guarantee in Filext’s terms and privacy policy
Please allow ads on our site
This helps us keep our servers running. Then re-upload your file to view it.Click here to see how to disable the ad blocker for filext.com
Programs that open and convert ER files:
- ERMaster
See the previous paragraphs to learn more about the main application. ER files are often referred to as ERMaster games because this type of file is primarily created or used by this software.
- AOL (3.0 Organizer) by America Online, Inc.
ER format details:
If you can determine the file format, the associated program can also be determined. The first characters in a file identify the file format, for example, HTML files start with the bytes <html>. If the file extension does not match the file format, double-clicking on the file will cause an error upon opening. So a detailed analysis of a file is vital in order to determine the format and the associated program. Our examination of the ER files comes to the following conclusion:
The ER file ending includes different formats for different programs. But the following two file formats are common:
- 65% of all ER files start with the magic bytes RSTMþÿ, which are always the first bytes of this file format. The contents of these files cannot be read by a human; only a computer program can interpret the data. The files are often between 1 MB and 5 MB in size. This file type is based on cutting-edge technology. Certain words are almost always found in the files, such as HEAD and RSTM. Some examples of file names are AIRSHIP.er. Files like these are sometimes connected to castle, boss, autumn, athletic, ambush, tower, bowser and bonus.
- 6% of all ER files use ZIP compression, the ER file contains a number of compressed files. Most often they are 1 to 70 compressed files. Customary file names are storeEncrypted. A little tip: If you rename the file extension to .zip and then double-click, you will see the included files and images. A typical file size is 7 KB. The files contain the following words: storeEncrypted. Some examples of file names are ER_2020-06-01 10-30.er.
All the rest of the ER files (29%) have different formats, often, for example, TestExecutive and title. The category is report, tropical, underground, cliffs, jungle or star. Drag & drop your file here to see the file format and a preview of your ER file!
Technical Data for ER File Extension
File classification:
Game
Related files:
Mime type:
The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and file extension information submitted by users.
ProgramID: CERFile
EXEFile: rundll32.exe cryptext.dll,CryptExtOpenCER %1
EXEFile: rundll32.exe cryptext.dll,CryptExtOpenCER %1
an er data file is a special file format and should only be edited and saved with the appropriate software.
How to solve problems with ER files
- Associate the ER file extension with the correct application.
- Update your software that should actually open data files. Because only the current version supports the latest ER file format. Search, therefore, e.g. on the manufacturer website after an available ERMaster update.
- To make sure that your ER file is not corrupted or virus-infected, get the file again and scan it with Google's virustotal.com.
- Click here to open your .ER file online - secure, fast, and no downloads needed.