Handy Hex codes for HTML and URL character encoding

Character encoding and decoding numeric entities

HTML  URL   Description
----  ---   ----------------------
  %20=  space
! %21=! exclamation point bang
" %22=" quote aka double quote
# %23=# pound sign hash sign
% %25=% percent
& %26=& ampersand
' %27=' apostrophe aka single quote
( %28=( left parenthesis open paren
) %29=) right parenthesis close paran
* %2A=* asterisk star
+ %2B=+ plus
- %2D=- minus hyphen
. %2E=. period
/ %2F=/ forward slash (backslash = %5C)
0-9 %30-%39 = digits 0 - 9 zero through nine
: %3A=: colon,,, &#59; %3B=; semicolon
&#60; %3C=< less than,,, &#62; %3E=> greater than
&#61; %3D== equals
&#63; %3F=? question mark
&#64; %40=@ at sign
&#65;-&#90; %41-%5A = upper case letters A - Z
&#91;, &#93; %5B=[, %5D=] square brackets
&#92; %5C=\ backslash (forward slash = %2F)
&#94; %5E=^ carrot,,,,, %5F=_ underscore
&#97;-&#122; %61-%7A = lower case letters a - z
&#123; %7B={, &#125; %7D=} curley braces curly brackets
&#124; %7C=| vertical bar
&#126; %7E=~ tilde tidle