Prepara texto para insertarlo de forma segura en una cadena JSON.
Cuando un valor de cadena en JSON contiene comillas o caracteres especiales, hay que escaparlos. Esta herramienta lo hace.
Double quote becomes \", backslash \\, line break \n, carriage return \r, tab \t, backspace \b, form feed \f; other control characters become \u00XX.
No. JSON allows \/ but does not require it. Skipping it keeps the text shorter and easier to read.
No. JSON strings only use double quotes, so a single quote needs no escape.
No, JSON is UTF-8 and handles any character. The option exists for systems that want pure ASCII on the wire.
Without the option they stay as they are. With it, they become a surrogate pair such as \ud83d\ude00, which is how JSON writes characters outside the BMP.