URL’s frequently employ potentially conflicting characters such as question marks, ampersands, and pound signs. Fortunately, it is possible to encode such characters via their escaped hexadecimal ASCII representations. For example, we would write "?" as "%3F". Here are a few more URL character codes (case-insensitive):

  • <     %3C
  • >     %3E
  • #     %23
  • %     %25
  • {     %7B
  • }     %7D
  • |     %7C
  • \     %5C
  • ^     %5E
  • ~     %7E
  • [     %5B
  • ]     %5D
  • `     %60
  • ;     %3B
  • /     %2F
  • ?     %3F
  • :     %3A
  • @     %40
  • =     %3D
  • &     %26
  • $     %24
  • +     %2B
  • "     %22
  • space     %20

References