Files with .rtx extension are text documents. They serve as alternative to RTF format. .rtx files can have text styles and layouts. Files with .rtx extension are related to LogoManager. It allows managing Nokia phones. The file contains ringtones to add to phones. The format is similar to RTTTL. Files with extension .rtx fall under Text Files category. The WordPad program opens these files. The format was developed by unknown. The file contains ringtone for Nokia phones. It has advanced features over RTTTL.
Most .rtx files open with LibreOffice. The main association is Rich Text format. Other associations are uncommon files and GIS files. .rtx files are supported by Windows, Mac and iOS. To open an unknown .rtx file, right click it. Then click “Open with” to pick an application. If it doesn’t open, the file may be a data file. Some .rtx files should not be viewed.
Microsoft Word
LibreOffice Writer
TextEdit