A Manhattan judge on Thursday blocked Mayor de Blasio’s latest attempt to crack down on home-rental sites like Airbnb and HomeAway by enacting a law that would require the companies to turn over detailed data about their hosts.

The controversial bill, signed by de Blasio in August, was set to go into effect Feb. 2 and would have required hosts to provide the Mayor’s Office of Special Enforcement with their names, addresses, types of dwellings being rented, the frequency of rentals, rental income, and in some cases, their account name and number where hosts receive their rental fees.

Hosts faced fines starting at $1,500 if they didn’t comply.

The city council ordinance is aimed at weeding out illegal listings and curbing a service that critics have said contributes to the city’s housing crisis.

Airbnb and HomeAway immediately sued, calling the bill “an extraordinary act of government overreach” as well as a violation of the Fourth Amendment.

“It is also the product of a multi-million dollar campaign funded by the City’s powerful hotel lobby which is intent on intimidating New Yorkers into abandoning homesharing,” Airbnb’s complaint said.

Manhattan federal Judge Paul Engelmayer’s order will remain in effect as the lawsuit plays out.

In his 52-page opinion, the jurist said the issue is a matter of public interest, while hinting that the companies may very well be victorious in their fight against the city.

“The court has found that Airbnb and HomeAway are likely to succeed on their claim that the ordinance violates the Fourth Amendment,” he wrote.

Engelmayer also slammed the city for the law, which he said appears to violate the Fourth Amendment against unlawful search and seizure.

“The City has not justified its sweeping capture of constitutionally protected records,” the judge wrote.

The new law demands so much information on a monthly basis that it would have been unfeasible to comply with in the paper era, the judge said.

“An attempt by a municipality in an era before electronic data storage to compel an entire industry monthly to copy and produce its records as to all local customers would have been unthinkable under the Fourth Amendment,” he added.

“It would have been out of bounds on the grounds of excessive burden alone.”

Modern technology makes the “breathtaking” production demands easier, but not constitutional, the Engelmayer said, adding that it could open the floodgates to government fishing expeditions of tech companies if allowed to proceed.

“A ruling upholding the Ordinance as reasonable would invite municipalities to make similar demands on e-commerce companies, whether by legislation or subpoena, for the routinized production to investigative agencies of broad-ranging records as to all users or customers,” the judge said.

Airbnb cheered the preliminary injunction as a “huge win” for it and its users, “including the thousands of New Yorkers at risk of illegal surveillance who use Airbnb to help make ends meet.”

“The court today recognized the fundamental importance of New Yorkers’ constitutional rights to privacy and the sanctity of their own homes,” a spokeswoman said in a statement.

State law prohibits short-term apartment rentals of less than 30 days unless the host is present. City law contains similar restrictions for 1- and 2-family homes.

The city Law Department didn’t immediately comment.