Meta said on Tuesday that it was ending its longstanding fact-checking program, a policy instituted to curtail the spread of misinformation across its social media apps, in a stark sign of how the company was repositioning itself for the Trump presidency and throwing its weight behind unfettered speech online.

Meta, which owns Facebook, Instagram and WhatsApp, said it would now allow more speech, rely on its users to correct inaccurate and false posts, and take a more personalized approach to political content. It described the changes with the language of regret, saying it had strayed too far from its values over the previous decade.

“It’s time to get back to our roots around free expression,” Mark Zuckerberg, Meta’s chief executive, said in a video announcing the changes. The company’s fact-checking system, he added, had “reached a point where it’s just too many mistakes and too much censorship.”

Mr. Zuckerberg conceded there would be more “bad stuff” on the platforms as a result of the decision. “The reality is that this is a trade-off,” he said. “It means that we’re going to catch less bad stuff, but we’ll also reduce the number of innocent people’s posts and accounts that we accidentally take down.”

Ever since Donald J. Trump’s victory in November, few big companies have worked as overtly to curry favor with the president-elect, who, during his first administration, accused social media platforms of censoring conservative voices. In a series of announcements during this presidential transition period, Meta has sharply shifted its strategy in response to what Mr. Zuckerberg called a “cultural tipping point” from the election.

Mr. Zuckerberg dined with Mr. Trump at Mar-a-Lago in November and Meta later donated $1 million to support Mr. Trump’s inauguration. Last week, Mr. Zuckerberg elevated Joel Kaplan, the highest-ranking Meta executive closest to the Republican Party, to the company’s most senior policy role. And on Monday, Mr. Zuckerberg said Dana White, the head of the Ultimate Fighting Championship and an ally of Mr. Trump’s, would join Meta’s board.

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