"Today we have delivered to foreign minister Ignacio Walker a diplomatic document formalizing the extradition request for Peruvian citizen Alberto Fujimori," said Peru's ambassador to Chile, Jose Antonio Meier.
A Supreme Court judge will now consider the Peruvian request.
Mr Fujimori, 67, has been detained in Chile here since early November.
He arrived unannounced in Santiago from Japan planning to launch a 2006 campaign for Peru's presidency, but was instead arrested at Lima's request.
Peruvian investigators have prepared a series of corruption and human rights charges against Mr Fujimori stemming from his 1990-2000 presidency.
Human rights
He still has a loyal following in Peru, where he is credited with reining in economic chaos and leftist insurgencies.
However, he is also accused of trampling on democracy and human rights.
Mr Fujimori has said he is innocent and is the victim of political persecution.
The extradition request cited 12 counts against Mr Fujimori, 10 of which related to alleged acts of corruption with the remaining two counts alleging grave rights violations, according to Mr Maldonado.
Mr Fujimori is accused of corrupting officials and overseeing forced abductions, homicides and torture.
Peru's government delivered 12 boxes of documents weighing 93 kilograms in support of its extradition request.
Chile's foreign ministry is now obliged to forward the extradition request to Supreme Court judge Orlando Alvarez.
Judge Alvarez ordered Mr Fujimori's arrest shortly after his surprise arrival here in November.
Under Chilean law, the courts have to review any extradition request from a foreign government.
It will be up to Judge Alvarez to approve or reject the request.
Respect for court ruling
Spokesman Osvaldo Puccio said the Chilean government would respect a court ruling on the extradition bid and that the process would be impartial despite Mr Fujimori's standing as a former head of state.
"The Chilean government acts on the basis of facts, not speculation," Mr Puccio told reporters.
Mr Fujimori's lawyers are expected to request their client be freed, or released into house arrest, pending a decision on the extradition request.
But Peruvian state prosecutor Antonio Maldonado said he would strongly object to any such move, because of the likelihood Fujimori would seek to flee.
Mr Fujimori resigned as president in 2000 by fax from Japan. Tokyo refused Lima's requests to extradite Mr Fujimori and he was granted Japanese nationality.
Mr Fujimori's Chilean lawyer said last month that his client has been spending his time in detention reading and learning the guitar as well as growing roses in a little garden.
A recent poll found he would make round two of the April presidential vote if he could run, although Peruvian law prohibits him from holding office until 2011.