JSON Unescape

Unescapes a JSON string.

The following characters are reserved in JSON and must be properly escaped to be used in strings:

• \b is replaced with backspace
• \f is replaced with form feed
• \n is replaced with newline
• \r is replaced with carriage return
• \t is replaced with tab
• \" is replaced with double quote
• \\ is replaced with backslash

Source:
[1] www.freeformatter.com/json-escape.html