Jeffrey Epstein wrote a suicide note before his 2019 death in a New York City federal lockup, his cellmate claims — but its contents remain secret seven years after his death because a judge ordered it sealed, a new report revealed Thursday.

Epstein, 66, reportedly proclaimed his innocence in the note, which he scrawled on a piece of yellow legal paper and tucked into a book in his cell at Metropolitan Correctional Center.

“What do you want me to do, bust out crying?” the note reportedly read, in part, disgraced cop and convicted killer Nicholas Tartaglione told the New York Times.

Epstein investigators had “found nothing” on him despite months of searching.

“Time to say goodbye,” it added.

Epstein had accused Tartaglione of trying to strangle him in July 2019 after jail staff found red marks on the pedo’s neck.

Tartaglione always denied that he attacked the well-connected sex offender — and some have speculated that the marks on Epstein’s neck were really from a suicide attempt just weeks after his arrest and incarceration.

After Epstein was transferred to a new cell, Tartaglione told the Times he found the note inside a graphic novel that had been left behind. Tartaglione said he gave it to his lawyers to support his claims that he never tried to hurt Epstein.

The note was verified as having been written by Epstein within a year, according to the Times.

But it has remained under seal by a federal judge as part of Tartaglione’s ongoing efforts to clear his name for the four murders he was convicted of carrying out.

The note has not appeared in the trove of Epstein files released by the Department of Justice this year, with the agency telling the Times its investigators had never seen it.