UTF8UTF16
UTF8UTF16 is not an official encoding defined by the Unicode Standard. In documentation and code, the term is sometimes used informally to refer to either UTF-8 or UTF-16, or to workflows that involve converting text between these two Unicode encodings. There is no single encoding named UTF8UTF16; the two are distinct formats with different characteristics and typical use cases.
UTF-8 encodes the entire set of Unicode code points as a variable-length sequence of 1 to 4
UTF-16 represents code points using 16-bit units. Code points in the Basic Multilingual Plane fit in a
Converting between UTF-8 and UTF-16 involves decoding to Unicode code points and re-encoding. This requires handling
In practice, UTF-8 is often preferred for interchange and storage in cross-platform software, while UTF-16 remains