Supreme Court Justice Alexandre de Moraes, who had been engaged in a prolonged dispute with Musk, granted X permission to restart its services in Latin America's largest nation immediately.
In his ruling, Moraes indicated that X had fulfilled all necessary conditions to recommence its activities in Brazil.
Musk, who had criticized the court's directives as a form of censorship and labeled Moraes a "dictator," began to change his stance in recent weeks. His platform has since blocked accounts identified by the court, appointed a local representative, and settled outstanding fines.
In his ruling on Tuesday, Moraes mandated that Brazil's telecommunications regulator, Anatel, must facilitate X's return online within 24 hours. However, as of 7 p.m. local time, users in Brazil were still unable to access the platform.
Through its Global Affairs account, X expressed its pride in returning to Brazil, stating that it "will continue to defend freedom of speech, within the boundaries of the law" in the countries where it operates.
The situation in Brazil is part of a broader series of confrontations involving Musk, who positions himself as a proponent of free speech, and various governments, including those of Australia and the United Kingdom, that are working to curb the spread of online misinformation.
Brazil's communication minister remarked on Tuesday that X's compliance with court orders and payment of fines represented a "victory for the country."
Juscelino Filho stated, "We showed the world that here our laws should be respected, by whomever it may be."