RT File Extension
RealText Streaming Text Format
- File Type rt
- Developer RealNetworks
- Popularity
- Application Notepad++
- Category Text Files
What is a RT file?
The RT file extension is linked to RealText Streaming Text Format and belongs to the Text Files category, which includes 315 files.
RealNetworks, the developer of the RealText Streaming Text Format (RT), has released file format and 3 programs designed to handle them.
RT files are supported by Windows, Mac OS and Linux. There are 4 programs available to open a RT file, including popular tools like Notepad++, Sublime Text and Gedit.
MIME types
- text/richtext
Programs that support RT files
How to open a RT file?
If you are having trouble opening a RT file, it usually means the right software is not installed. Choose a program from the list that matches your operating system. Next, visit the official website of the developer, download the software, and install it on your device.
The most popular programs for working with RT files are Notepad++, Sublime Text and Gedit. To install the current version of Notepad++, go directly to the official Notepad++ Team website. The universal package for all operating systems is available there.
After setup, the operating system should recognize RT files and link them with Notepad++.
Setting Notepad++ as default RT viewer
Changing the default program in Windows
- Right-click on your RT file and choose the "Open With" option. Then click "Choose another app" to continue the process;
- Choose Notepad++ from the available applications listed in the pop-up window to set it as the default application to open your RT file;
- Be sure to check the "Always use this app" checkbox, and then click "OK" to confirm your selection.
Change the default app for a file type in Mac
- Initiate a right click or use Control + left click on the desired RT file to open a menu where you can select various actions;
- Select "Open in application" and click "Other";
- Scroll down to the bottom of the window, and there you will find the "Enable" menu. The default selection is "Recommended Programs";
- Choose "All Programs" within this menu and locate Notepad++. Check the box next to "Always open in app" to set it as the default program.
How to edit a RT file?
To edit RT files, you need to install specialized software that allows you not only to open but also to modify text files. Online RT editors usually provide fewer features than software created specifically for RealText Streaming Text Format.
Best RT editors in 2026
Based on your described criteria, here is a list of available RT editors.
| RT Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| TextEdit | Apple | Mac OS | 4.8 out of 5 (40 reviews) |
| Gedit | GNOME | Linux | 4.6 out of 5 (38 reviews) |
| Notepad++ | Notepad++ Team | Windows | 4.6 out of 5 (37 reviews) |
| Sublime Text | Sublime HQ Pty | Windows, Mac OS, Linux | 4.6 out of 5 (39 reviews) |
Tips and tricks to solve problems with RT files
RT files can sometimes be tricky, but minor software adjustments usually resolve the issues. Refer to the tips below for guidance.
Are there any symptoms that my RT file is damaged?
Corrupted RT text files may have one or more of the following symptoms:
- File hangs or crashes in Notepad++ or other programs;
- Error dialogs are displayed when interacting with the file;
- The file does not open or opens with errors;
- Unexplained increase in RT file size;
- Poor performance when editing a file in Notepad++;
Why does Notepad++ crash or shut down frequently?
The absence of software updates can cause Notepad++ to crash. It is recommended to install the latest available updates for Notepad++ Team products.
Restarting your computer is an essential troubleshooting step that can resolve many common problems. It is recommended to restart your computer before making any changes to the software settings.
Is there any specific software or utility that can help repair a damaged RT file?
Start a data recovery program and open the damaged RT file. Go to the menu and select the "Repair" option to repair the file. Then wait for the recovery process to complete, which allows you to automatically repair corrupted text files.