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What's the difference between utf 7 and utf 8?


Asked by Eric Duarte on Dec 14, 2021 FAQ



UTF refers to several types of Unicode character encodings, including UTF-7, UTF-8, UTF-16, and UTF-32. UTF-7 - uses 7 bits for each character. It was designed to represent ASCII characters in email messages that required Unicode encoding.
In fact,
UTF-8 uses a byte at the minimum in encoding the characters while UTF-16 uses two 3. A UTF-8 encoded file tends to be smaller than a UTF-16 encoded file 4. UTF-8 is compatible with ASCII while UTF-16 is incompatible with ASCII
Thereof, Scripts are collections of characters included in a character set, usually concerning different languages and alphabets, such as Greek or Han. Unicode standards are implemented by either UTF-8, UTF-16, or UTF-32. UTF-7 stands for 7-bit Unicode Transformation Format.
Consequently,
1 UTF-8 is a widely used encoding while ANSI is an obsolete encoding scheme 2 ANSI uses a single byte while UTF-8 is a multibyte encoding scheme 3 UTF-8 can represent a wide variety of characters while ANSI is pretty limited 4 UTF-8 code points are standardized while ANSI has many different versions
Accordingly,
UTF-16 is not backward compatible with ASCII where UTF-8 is well compatible. An ASCII encoded file is identical with a UTF-8 encoded file that uses only ASCII characters. As UTF-8 is a byte-oriented format unlike UTF-16, So, no needs of byte order established in the case of UTF-8.