difference between 'made by me' and 'made by myself'

made by me - (Made by me = I made it.)
made by myself - (Made by myself = I made it alone, with no one else' help.)

What is the difference between Made by Me and Made by Myself?

(I'm usually saying "made by me'' not "made by myself")

•  No difference..both say you made it..so say it however you want.

• Made by me = I made it. 
  Made by myself = I made it alone, with no one else' help.

• I is use as the subject of a sentence - I gave her a kiss. 
  Me is used as the object (direct or inirect) of a sentence - she gave me a kiss. 
  Myself is an emphatic version of I and me: 
  
  I myself prefer . . . 
  Who should I speak to? Myself. 
  
  For this reason, people often use 'myself' when they don't know whether to use I or me!

By Me or By Myself: what's the difference?

(One more doubt today...

It was made by me

It was made by myself

it would mean that I made it.... 

Could you please help?)

• The correct equivalent of “I made it” is “it was made by me.” [these days people seem to use “myself” instead of “me” more and more frequently.]
  However, you could say “I made it myself”

• I made it by myself is very specific i.e. no one helped me.

• o, "made by me" is the best translation...
  thank you Franco-filly and MarcB for your precious help!