Anthony's attorney, Charles Greene, said his client was free as of midnight, ABCNews.com reported Friday.
"She's lost her daughter, she's lost most or all of her family, she's lost her friends, she's reviled by a percentage of the population and that will probably never change," Greene said. "She will never be able to walk down the street with anonymity."
Anthony, 26, was found innocent by a jury sitting in Orlando, Fla., last summer in the death of her 2-year-old daughter, Caylee Anthony. After her acquittal, Florida Judge Belvin Perry ordered her to serve one year of probation for a 2010 check fraud conviction.
She served her probation at an undisclosed location, ABCNews.com said.
Greene did not provide details about Anthony's location or plans.
"The last year has been a whilrwind because of security and things we've had in place given she had to stay in one location and the fear we had she might be discovered and placed in danger," he said. "Now she'll have a little more peace and peace of mind to look forward to, and part of looking forward will involve looking back. She really hasn't had time to do that."