The presumptive Democratic presidential nominee's camp issued a statement shortly after the private, three-hour meeting in Washington, D.C. It's believed to be the final step in the FBI's investigation into whether Clinton broke any laws when she sent and received documents through a private email server that she kept at home while serving as Secretary of State.
"Secretary Clinton gave a voluntary interview this morning about her email arrangements while she was Secretary," Clinton spokesman Nick Merrill said in a written statement. "She is pleased to have had the opportunity to assist the Department of Justice in bringing this review to a conclusion. Out of respect for the investigative process, she will not comment further on her interview."
Clinton was not under oath during the interview, tweeted NBC News reporter Frank Thorp.
Clinton admitted last year that she made a "mistake" in allowing thousands of government documents to pass through her home email server. But she maintains she didn't break any law, Reuters news agency reports.
Meanwhile, U.S. Attorney General Loretta Lynch said on Friday she'll use recommendations from the FBI director and prosecutors to decide whether to charge Clinton.
Lynch made the statement after it was revealed that she met privately with former President Bill Clinton in Phoenix, raising concerns about her ability to remain impartial in the investigation.
Later Saturday, Clinton told NBC News' Chuck Todd that she learned about her husband's encounter with Lynch in the news.
"They said hello, they talked about grandkids," she said. "It was purely social."
Asked about the FBI meeting, Clinton would not say if agents had indicated there would be charges. "I am not going to comment on the process; I have no knowledge of any timeline," she said.