I search about a good tool that help me to Vectorize my pixel photos to enhance the quality but be a free tool ?

I work as a graphic designer sometimes i see some photos with bad quality like a blurred pixels . so I search about a good tool that help me to Vectorize my pixel photos to enhance the quality but be a free tool ? 

Parents
  • I don't know any but would love to know myself to fixs some photos I have

Reply
  • I don't know any but would love to know myself to fixs some photos I have

Children
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