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SAN FRANCISCO — If it feels like TikTok has been around forever, that's probably because it has, at least if you're measuring via internet time. What's now in question is whether it will be around much longer and, if so, in what form? Starting in 2017, when the Chinese social video app merged with its competitor Musical.ly, TikTok has grown from a niche teen app into a global trendsetter. While, of course, also emerging as a potential national security threat, according to U.S. officials. On April 24, President Joe Biden signed legislation requiring TikTok parent ByteDance to sell to a U.S. owner within a year or to shut down. TikTok and its China-based parent company, ByteDance, filed a lawsuit against the U.S., claiming the security concerns were overblown and the law should be struck down because it violates the First Amendment. The Supreme Court on Friday unanimously upheld the federal law banning TikTok, and the popular short form video service went dark in the U.S. — just hours before the ban was set to begin. Here's how TikTok came to this juncture: March 2012 ByteDance is founded in China by entrepreneur Zhang Yimin. Its first hit product is Toutiao, a personalized news aggregator for Chinese users. July 2014 Startup Musical.ly, later known for an eponymous app used to post short lipsyncing music videos, is founded in China by entrepreneur Alex Zhu. July 2015 Musical.ly hits #1 in the Apple App Store, following a design change that made the company's logo visible when users shared their videos. 2016 ByteDance launches Douyin, a video sharing app for Chinese users. Its popularity inspires the company to spin off a version for foreign audiences called TikTok. November 2017 ByteDance acquires Musical.ly for $1 billion. Nine months later, ByteDance merges it with TikTok. Powered by an algorithm that encourages binge-watching, users begin to share a wide variety of video on the app, including dance moves, kitchen food preparation and various "challenges" to perform, record and post acts that range from serious to satirical. February 2019 Rapper Lil Nas X releases the country-trap song "Old Town Road" on TikTok, where it goes viral and pushes the song to a record 17 weeks in the #1 spot on the Billboard Hot 100 chart. The phenomenon kicks off a wave of TikTok videos from musical artists who suddenly see TikTok as a critical way to reach fans. TikTok settles federal charges of violating U.S. child-privacy laws and agrees to pay a $5.7 million fine. September 2019 The Washington Post reports that while images of Hong Kong democracy protests and police crackdowns are common on most social media sites, they are strangely absent on TikTok. The same story notes that TikTok posts with the #trump2020 tag received more than 70 million views. The company insists that TikTok content moderation, conducted in the U.S., is not responsible and says the app is a place for entertainment, not politics. The Guardian reports on internal documents that reportedly detail how TikTok instructs its moderators to delete or limit the reach of videos touching on topics sensitive to China such as the 1989 Tiananmen Square protests and subsequent massacre, Tibetan independence or the sanctioned religious group Falun Gong. October 2019 U.S. politicians begin to raise alarms about TikTok's influence, calling for a federal investigations of its Musical.ly acquisition and a national security probe into TikTok and other Chinese-owned apps. That investigation begins in November, according to news reports. December 2019 The Pentagon recommends that all U.S. military personnel delete TikTok from all phones, personal and government-issued. Some services ban the app on military-owned phones. In January, the Pentagon bans the app from all military phones. TikTok becomes the second-most downloaded app in the world, according to data from analytics firm SensorTower. May 2020 Privacy groups file a complaint alleging TikTok is still violating U.S. child-protection laws and flouting a 2019 settlement agreement. The company "takes the issue of safely seriously" and continues to improve safeguards, it says. TikTok hires former Disney executive Kevin Mayer as its chief executive officer in an apparent attempt to improve its U.S. relations. Mayer resigns three months later. July 2020 India bans TikTok and dozens of other Chinese apps in response to a border clash with China. President Donald Trump says he is considering banning TikTok as retaliation for China's alleged mishandling of the COVID-19 pandemic. August 2020 Trump issues a sweeping but vague executive order banning American companies from any "transaction" with ByteDance and its subsidiaries, including TikTok. Several days later, he issues a second order demanding that ByteDance divest itself of TikTok's U.S. operations within 90 days. Microsoft confirms it is exploring acquisition of TikTok. The deal never materializes; neither does a similar overture from Oracle and Walmart. TikTok, meanwhile, sues the Trump administration for alleged violation of due process in its executive orders. November 2020 Joe Biden is elected president. He doesn't offer new policy on TikTok and won't take office until January, but Trump's plans to force a sale of TikTok start to unravel anyway. The Trump administration extends the deadlines it had imposed on ByteDance and TikTok and eventually lets them slide altogether. February 2021 Newly sworn-in President Joe Biden postpones the legal cases involving Trump's plan to ban TikTok, effectively bringing them to a halt. September 2021 TikTok announces it has more than a billion monthly active users. December 2021 A Wall Street Journal report finds TikTok algorithms can flood teens with a torrent of harmful material such as videos recommending extreme dieting, a form of eating disorder. February 2022 TikTok announces new rules to deter the spread of harmful material such as viral hoaxes and promotion of eating disorders. April 2022 "The Unofficial Bridgerton Musical," a project created by two fans of the Netflix show as a TikTok project, wins the Grammy for Best Musical Theater Album. TikTok becomes the most downloaded app in the world, beating out Instagram, according to SensorTower data. June 2022 BuzzFeed reports that China-based ByteDance employees have repeatedly accessed the nonpublic information of TikTok users, based on leaked recordings from more than 80 internal TikTok meetings. TikTok responds with a vague comment touting its commitment to security that doesn't directly address the BuzzFeed report. TikTok also announces it has migrated its user data to U.S. servers managed by the U.S. tech firm Oracle. But that doesn't prevent fresh alarm among U.S. officials about the risk of Chinese authorities accessing U.S. user data. December 2022 FBI Director Christopher Wray raises national security concerns about TikTok, warning that Chinese officials could manipulate the app's recommendation algorithm for influence operations. ByteDance also said it fired four employees who accessed data on journalists from Buzzfeed News and The Financial Times while attempting to track down leaks of confidential materials about the company. February 2023 The White House gives federal agencies 30 days to ensure TikTok is deleted from all government-issued mobile devices. Both the FBI and the Federal Communications Commission warn that ByteDance could share TikTok user data with China's authoritarian government. March 2023 Legislators grill TikTok CEO Shou Zi Chew at a six-hour congressional hearing where Chew, a native of Singapore, attempts to push back on assertions that TikTok and ByteDance are tools of the Chinese government. January 2024 TikTok said it was restricting a tool some researchers use to analyze popular videos on the platform. March 2024 A bill to ban TikTok or force its sale to a U.S. company gathers steam in Congress. TikTok brings dozens of its creators to Washington to tell lawmakers to back off, while emphasizing changes the company has made to protect user data. TikTok also annoys legislators by sending notifications to users urging them to "speak up now" or risk seeing TikTok banned; users then flood congressional offices with calls. The House of Representatives passes the TikTok ban-or-sell bill. April 2024 The Senate follows suit, sending the bill to President Biden, who signs it. May 2024 TikTok and its Chinese parent company ByteDance sue the U.S. federal government to challenge a law that would force the sale of ByteDance's stake or face a ban, saying that the law is unconstitutional. June 2024 Former President Donald Trump joins TikTok and begins posting campaign-related content. July 2024 Vice President Kamala Harris joins TikTok and also begins posting campaign-related material. Dec. 6, 2024 A federal appeals court panel unanimously upheld a law that could lead to a ban on TikTok, handing a resounding defeat to the popular social media platform as it fights for its survival in the U.S. The panel of judges rebuffed the company's challenge of the statute, which it argued had ran afoul of the First Amendment. Dec. 27, 2024 President-elect Donald Trump asked the Supreme Court to pause the potential TikTok ban from going into effect until his administration can pursue a "political resolution" to the issue. Jan. 17, 2025 The Supreme Court unanimously upheld the federal law banning TikTok beginning unless it's sold by its China-based parent company, holding that the risk to national security posed by its ties to China overcomes concerns about limiting speech by the app. A ban is set to into effect on Jan. 19, 2025. Jan. 18, 2025 TikTok users in the United States were prevented from watching videos on the popular social media platform just hours before a federal ban was set to take effect. "A law banning TikTok has been enacted in the U.S.," a message in the app said. "Unfortunately, that means you can't use TikTok for now." The company's app was also removed from prominent app stores, including the ones operated by Apple and Google, while its website told users that the short-form video platform was no longer available. Jan. 19, 2025 Shortly after the app went dark for U.S. users, Trump said he would issue an executive order upon taking office to grant TikTok an extension so that it could remain online. A few hours later, TikTok restored service to users in the United States, saying that Trump had provided "the necessary clarity and assurance to our service providers that they will face no penalties providing TikTok to over 170 million Americans."

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Washington — TikTok said Sunday it was restoring service to users in the United States after the popular video-sharing platform went dark in response to a federal ban that President-elect Donald Trump said he would try to pause by executive order on his first day in office.  Trump said he planned to issue the order to give TikTok’s China-based parent company more time to find an approved buyer before the popular video-sharing platform is subject to a permanent U.S. ban. He announced the move on his Truth Social account as millions of U.S. TikTok users awoke to discover they could no longer access the TikTok app or platform.  Google and Apple removed the app from their digital stores to comply with the law, which required them to do so if TikTok parent company ByteDance didn’t sell its U.S. operation by Sunday. The law, which passed with wide bipartisan support in April, allowed for steep fines for non-compliance.  The company that runs TikTok said in a post on X that Trump's post had provided “the necessary clarity and assurance to our service providers that they will face no penalties providing TikTok to over 170 million Americans.”  Some users reported soon after TikTok's statement that the app was working again, and TikTok’s website appeared to be functioning for at least some users. Even as TikTok was flickering back on, it remained unavailable for download in Apple and Google’s app stores.  The law that took effect Sunday required ByteDance to cut ties with the platform’s U.S. operations due to national security concerns posed by the app’s Chinese roots. However, the statute gave the sitting president authority to grant a 90-day extension if a viable sale is under way.  Although investors made a few offers, ByteDance previously said it would not sell. In his post on Sunday, Trump said he “would like the United States to have a 50% ownership position in a joint venture,” but it was not immediately clear if he was referring to the government or an American company.  Trump said his order would “extend the period of time before the law’s prohibitions take effect” and "confirm that there will be no liability for any company that helped keep TikTok from going dark before my order.  “Americans deserve to see our exciting Inauguration on Monday, as well as other events and conversations,” Trump wrote.  The on-and-off availability of TikTok came after the U.S. Supreme Court held in a unanimous ruling Friday that the risk to national security posed by TikTok’s ties to China outweighed concerns about limiting speech by the app or its millions of users in the United States.  When TikTok users in the U.S. tried to watch or post videos on the platform as of Saturday night, they saw a pop-up message under the headline, “Sorry, TikTok isn’t available right now.”  “A law banning TikTok has been enacted in the U.S.,” a pop-up message informed users who opened the TikTok app and tried to scroll through videos on Saturday night. “Unfortunately that means you can’t use TikTok for now.”  The service interruption TikTok instituted hours earlier caught most users by surprise. Experts had said the law as written did not require TikTok to take down its platform, only for app stores to remove it. Current users had been expected to continue to have access to videos until the app stopped working due to a lack of updates.  “The community on TikTok is like nothing else, so it’s weird to not have that anymore,” content creator Tiffany Watson, 20, said Sunday.  Watson said she had been in denial about the looming shutdown and with the time on her hands plans to focus on bolstering her presence on Instagram and YouTube.  “There are still people out there who want beauty content,” Watson said.  The company’s app also was removed late Saturday from prominent app stores, including the ones operated by Apple and Google. Apple told customers with its devices that it also took down other apps developed by TikTok’s China-based parent company, including one that some social media influencers had promoted as an alternative.  “Apple is obligated to follow the laws in the jurisdictions where it operates,” the company said.  Trump's plan to issue an executive order to spare TikTok on his first day in office reflected the ban's coincidental timing and the unusual mix of political considerations surrounding a social media platform that first gained popularity with often silly videos featuring dances and music clips.  During his first term in the White House, Trump issued executive orders in 2020 banning TikTok and the Chinese messaging app WeChat, moves that courts subsequently blocked. When momentum for a ban emerged in Congress last year, however, he opposed the legislation. Trump has since credited TikTok with helping him win support from young voters in last year's presidential election.  Despite its own part in getting the nationwide ban enacted, the Biden administration stressed in recent days that it did not intend to implement or enforce the ban before Trump takes office on Monday.  In the nine months since Congress passed the sale-or-ban law, no clear buyers emerged, and ByteDance publicly insisted it would not sell TikTok. But Trump said he hoped his administration could facilitate a deal to “save” the app.  TikTok CEO Shou Chew is expected to attend Trump’s inauguration with a prime seating location.  Chew posted a video late Saturday thanking Trump for his commitment to work with the company to keep the app available in the U.S. and taking a “strong stand for the First Amendment and against arbitrary censorship.”  Trump's choice for national security adviser, Michael Waltz, told CBS News on Sunday that the president-elect discussed TikTok going dark in the U.S. during a weekend call with Chinese President Xi Jinping “and they agreed to work together on this.”  On Saturday, artificial intelligence startup Perplexity AI submitted a proposal to ByteDance to create a new entity that merges Perplexity with TikTok's U.S. business, according to a person familiar with the matter.  Perplexity is not asking to purchase the ByteDance algorithm that feeds TikTok user’s videos based on their interests and has made the platform such a phenomenon.  Other investors also eyed TikTok. “Shark Tank” star Kevin O’Leary recently said a consortium of investors that he and billionaire Frank McCourt are part of offered ByteDance $20 billion in cash. Trump’s former treasury secretary, Steven Mnuchin, also said last year that he was putting together an investor group to buy TikTok.  In Washington, lawmakers and administration officials have long raised concerns about TikTok, warning the algorithm that fuels what users see is vulnerable to manipulation by Chinese authorities. But to date, the U.S. has not publicly provided evidence of TikTok handing user data to Chinese authorities or tinkering with its algorithm to benefit Chinese interests.

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