Essa Suleiman was remanded into custody after appearing in Westminster Magistrates Court on Friday to face two counts of the charge related to the attack in Golders Green on Wednesday.
He also faces a third count of attempted murder over an incident elsewhere in the city earlier the same day that left a man with minor injuries.
Police have labelled the Golders Green attack an act of terrorism.
Suleiman, a Somalia-born British citizen who lives in London, did not enter a plea.
His case was transferred to the Central Criminal Court for a May 15 hearing.
Police say Suleiman was referred in 2020 to the government's Prevent program, which tries to steer individuals away from extremism.
The police force said his file was closed later the same year, and did not disclose the reason for the referral.
The British government pledged to tackle anti-Semitism after the stabbings in an area in north London that is an epicenter of Britain's Jewish community.
The victims, aged 34 and 76, were seriously injured.
One has since been discharged from a hospital and the other is in stable condition.
The stabbings followed a string of arson attacks on synagogues and other Jewish sites in London in recent weeks.
Prime Minister Keir Starmer said that his government would increase security for the Jewish community and "do everything in our power to stamp this hatred out".
Britain's official terrorism threat level was raised from substantial to severe after Wednesday's stabbing attack.
Severe is the second-highest rung on a five-point scale and means intelligence agencies consider an attack highly likely in the next six months.
The government said the change was not due solely to the Golders Green attack but also due to increased danger "from Islamist and extreme right-wing terrorist threat from individuals and small groups based in the UK".
