4MI File Extension

4MI file icon

AtariTools-800 4 missiles

What is a 4MI file?

AtariTools-800 4 missiles, identified by the 4MI extension, is a Raster Image Files type and includes 575 files.

4MI files are supported by Windows, Linux and Mac OS. You can view a 4MI file using one of 2 programs, for example AtariTools-800 and Recoil.

Programs that support 4MI files

How to open a 4MI file?

The most common reason why a 4MI file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.

The most popular programs for working with 4MI files are AtariTools-800 and Recoil. To get the latest version of AtariTools-800, open the website where a universal installer for all operating systems is available.

Once setup is done, your operating system should assign AtariTools-800 as the default app for 4MI files.

Make AtariTools-800 the default 4MI viewer

Changing the default program in Windows

  1. Start by right-clicking on your 4MI file and selecting the "Open With" option. From there, click "Choose another app" to continue;
  2. Inside the popup window, scroll through the list of applications and specifically choose AtariTools-800 as the application to associate with your 4MI file;
  3. Check the "Always use this app" checkbox and click "OK".

Change the default app to open files on Mac

  1. Right click or use Control + Left Click on the desired 4MI file to access a dropdown menu of actions;
  2. Select "Open in application" and click "Other";
  3. Scroll down to the bottom of the window, where you will find the "Enable" menu. Default, "Recommended Programs" will be selected;
  4. In this menu, choose "All Programs" and navigate to AtariTools-800. Check the box next to "Always open in app" to make it the default program.

How to edit a 4MI file?

To edit 4MI files, you need to install specialized software that allows you not only to open but also to modify raster image files. Online 4MI editors usually provide fewer features than software created specifically for AtariTools-800 4 missiles.

List of Top 4MI editors 2026

Following these criteria, we have put together a list of recommended 4MI editors.

4MI Editor SoftwareDeveloperPlatformsOverall Rating
AtariTools-800-Windows4.7 out of 5 (42 reviews)

Finding answers to 4MI file problems

If you encounter issues with 4MI files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.

What are the signs that my 4MI file is damaged?

Corrupted 4MI raster image files may have one or more of the following symptoms:

  • Poor performance when editing a file in AtariTools-800;
  • Opening or processing the file in AtariTools-800 or other programs causes instability or crashes in the program;
  • The file shows errors when trying to open it or does not open completely;
  • Unexpected expansion of the total size of the 4MI file;
  • Working with the file triggers the display of error messages;

Why does AtariTools-800 quit or crash unexpectedly?

AtariTools-800 crashes can be attributed to outdated software. Make sure you have installed the latest updates for developer products.

A computer restart is often the key to solving numerous common problems. That’s why, it is recommended to restart the computer before making any changes to the software settings.

What methods can be used to repair a damaged 4MI file?

Use a recovery program to open the damaged 4MI file and navigate to the "Repair" menu item. Wait for the recovery process to finish, as it will automatically repair damaged raster image files.