Text Converter Encoder Decoder is a free Android application developed by Mr Duy that provides a wide range of text manipulation tools. With this app, users can convert text to binary, octal, decimal, and hexadecimal, as well as create upside-down text, Morse code, Base64, and more. It also includes over 100 styles of special and decorated text, such as superscript and subscript.

In addition to these features, the app also supports base conversion and can read barcodes using the device's camera. Users can donate for the development of the app and unlock the pro version, which allows for fast encoding and decoding in the notification bar.