The French tourist who was randomly slashed in the neck on a Harlem sidewalk said he never saw the “gratuitous” attack coming.

Video of the gruesome incident shows the 27-year-old victim, identified by sources as Gabriel Bascou, kneeling on the ground on Adam Clayton Powell Jr. Boulevard near West 132nd Street Friday with blood gushing from his neck.

Bascou and his girlfriend were walking out of an IHOP at about 11 a.m. when the stranger ran up and slashed him across the face with a knife, police said.

“I didn’t see anything coming, he didn’t steal anything from me,” Bascou wrote in an Instagram post. “Just a gratuitous blow of absolute violence.”

Medics rushed Bascou to Harlem Hospital, where he was given a tracheotomy and intubated.

“The man slit my throat,” he added. “I can’t talk right now.”

His girlfriend, who declined to be named, told The Post her boyfriend was visiting her and had just arrived in town the night before the bloody attack.

“He’s on the mend. He’s been very lucky,” the frightened woman said. “I’m still scared…I’m apprehensive of leaving the hospital,” she said of the attack.

Images released of the suspect show him wearing a black hat, black clothing, and white Air Jordan sneakers.

No arrests have been made, cops said.