She said that she "chose not to keep" personal, private emails that had to do with planning her daughter Chelsea Clinton's wedding, her mother's funeral and yoga routines.
Clinton also talked about the private server that was used to host her email domain, saying that the system was set up for her husband and his post-presidential office that "proved to be effective and secure."
She also confirmed earlier reports that the server was based out of the former first couple's home in Chappaqua, New York.
"There were no security breaches," she added.
Clinton maintained that she "fully complied with every rule I was governed by." She did not directly address a 2005 update in the Foreign Affairs Manual codified by the State Department which ruled that employees could only use private email accounts for official business if they turned those emails over to be entered into government computers. That ruling also forbade State Department employees from including "sensitive but unclassified" information on private email, except for some very narrow exceptions. She did, however, note that she never sent classified information via email.
She said that the release will follow Freedom of Information Act guidelines, meaning that any redacted content will have an explanation about why it was removed.
It was publicly reported last week that Clinton, who is widely seen as the likely Democratic presidential nominee, used a private server and email domain during her tenure as Secretary of State rather than using the government's email system.
ABC News' Devin Dwyer and Liz Kreutz contributed to this report.