WikiLeaks founder Julian Assange faced a hearing Monday in the High Court in London that could end with him being sent to the U.S. to face espionage charges, or could provide him with another chance to appeal his extradition.

The outcome will depend on how much weight judges give to assurances U.S. officials have provided that Assange’s rights won’t be trampled if he goes on trial.

Arriving at court on Monday, Assange's wife, Stella Assange, said if the court did not rule in her husband's favor they would seek an emergency injunction from the European Court of Human Rights.

JULIAN ASSANGE LONDON HEARING COULD DECIDE WHETHER THE WIKILEAKS FOUNDER IS EXTRADITED TO THE US

Labour MP for Islington North Jeremy Corbyn told a crowd of Assange supporters outside court that his case had "massive implications around the world."

"If Julian goes down for this, if he goes down for this, every journalist everywhere around the world will be reluctant to expose the truth they know they have a moral responsibility to expose," Corbyn argued,

In March, two judges rejected the bulk of Assange's arguments but said he could take his case to the Court of Appeal unless the U.S. guaranteed he would not face the death penalty if extradited and would have the same free speech protections as a U.S. citizen.

Stella Assange, the wife of Julian Assange, speaks outside the Royal Courts of Justice in London

Stella Assange, the wife of Julian Assange, speaks outside the Royal Courts of Justice in London, after Julian's hearing on May 20, 2024. (Lucy North/PA Images via Getty Images)

The court said that if Assange, who is an Australian citizen, couldn’t rely on the First Amendment then it was arguable his extradition would be incompatible with the European Convention on Human Rights, which also provides free speech and media protections.

The U.S. has provided those reassurances, though Assange's legal team and supporters argue they are not good enough to rely on to send him to the U.S. federal court system.

The U.S. said Assange could seek to rely on the rights and protections of the First Amendment but that a decision on that would ultimately be up to a judge. In the past, the U.S. said it would argue at trial that Assange is not entitled to constitutional protection because he is not a U.S. citizen.

Assange, 52, has been indicted on 17 espionage charges and one charge of computer misuse over his website’s publication of a trove of classified U.S. documents almost 15 years ago.

American prosecutors allege that Assange encouraged and helped U.S. Army intelligence analyst Chelsea Manning to steal diplomatic cables and military files that WikiLeaks published.

Commuters emerging from a Tube stop near the courthouse couldn’t miss a large sign bearing Assange’s photo and the words, "Publishing is not a crime. War crimes are." Scores of supporters gathered outside the neo-Gothic Royal Courts of Justice chanting "Free Julian Assange" and "Press freedom, Assange freedom."

Some held a large white banner aimed at President Joe Biden, exhorting: "Let him go Joe."

Assange's lawyers say he could face up to 175 years in prison if convicted, though American authorities have said any sentence would likely be much shorter.

Assange’s family and supporters say his physical and mental health have suffered during more than a decade of legal battles, which includes seven years spent inside the Ecuadorian Embassy in London from 2012 until 2019. He has spent the past five years in a British high-security prison.

Assange’s lawyers argued in February that he was a journalist who exposed U.S. military wrongdoing in Iraq and Afghanistan. Sending him to the U.S., they said, would expose him to a politically motivated prosecution and risk a "flagrant denial of justice."

The U.S. government says Assange's actions went way beyond those of a journalist gathering information, amounting to an attempt to solicit, steal and indiscriminately publish classified government documents.

If Assange prevails on Monday, it would set the stage for an appeal process likely to extend what has already been a long legal saga.

If the court accepts the word of the U.S., it would mark the end of Assange’s legal challenges in the U.K., though it’s unclear what would immediately follow.

His legal team is prepared to ask the European Court of Human Rights to intervene. But his supporters fear Assange could be transferred before the court in Strasbourg, France, could halt his removal.

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Judges Victoria Sharp and Jeremy Johnson may also postpone issuing a decision.

If Assange loses in court, he still may have another shot at freedom.

Biden said last month that he was considering a request from Australia to drop the case and let Assange return to his home country.