In computer programming, a string is traditionally a sequenceofcharacters, either as a literal constant or as some kindofvariable. The latter may allow its elements to be mutated andthelength changed, or it may be fixed (after creation). A stringisgenerally considered a data type and is often implemented asanarray data structure of bytes (or words) that stores a sequenceofelements, typically characters, using some character encoding.TextEncoder Tools or String Encoding Tools allow encode anddecodestrings using URL Encoding, HTML Entities, Base64, and ROT13.