Horwath hosted a Toronto radio show Sunday on NewsTalk 1010 and a caller asked about Liberal Premier Kathleen Wynne's warning that a vote for the NDP is a vote for Hudak.
Horwath dismissed the idea of strategic voting by ramping up her own language.
"Don't let them tell you what to do," she said. "You don't have to pick between corrupt and crazy."
The NDP leader has framed the Liberals as corrupt in the run-up to the June 12 election and has previously said Hudak's math in his "Million Jobs" plan doesn't add up, but she went a step further on Sunday in her characterization of the Tories' platform.
Horwath defended and repeated her choice of words after the show.
"The ideas that Mr. Hudak is bringing don't make any sense and are frankly crazy," she said. "His ideas don't make sense and people tell me they definitely want change."
Hudak has won the endorsements of three major newspapers in this election — the Globe and Mail, the Toronto Sun and the National Post — while the Toronto Star has endorsed Wynne.
When asked about the endorsements Horwath didn't say why she thought none endorsed her plan, but said she is going to respect voters' abilities make up their own minds at the ballot box.
"I think people have a right to their own opinion, but I also believe that people don't like to be told," she said.
"They don't like to be told what to do. They don't like to be told what to think. They are very, very smart people here in Ontario."