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Files with the RTX extension are used for storing text documents. This format was developed by Microsoft. However, RTX files are supported by many editors not only developed by Microsoft. In addition to text, RTX documents contain information about its format (font, text formatting elements, page layout, etc.). Illustrations from files such as JPG or PNG are often added to such documents.

As RTX is recognized by many editors, it is often used as an exchange format between different applications and system platforms. RTF extension is used interchangeably for these files.

Windows

Updated 12/06/2021

.abw AbiWord Document Format
.ac AC3D Geometry Format
.aim AIMMS ASCII Model Format
.ans ANSI Text File (ANSI Art)
.apt Almost Plain Text Format
.asc ASCII Text Characters Format
.ascii ASCII Text Characters Format
.aty Association Type Placeholder

Last updated

.mmf 04/13/2023
.mup 04/13/2023
.itl 04/13/2023
.scs 04/10/2023
.crypt 04/10/2023
.pnp 04/10/2023
.tap 04/10/2023
.btr 04/03/2023