Google escapes again.

A federal judge ruled Wednesday that Google doesn’t have to break up its adtech business — which was the nuclear option sought by the Justice Department after the tech company was found to have operated an illegal monopoly in certain online advertising markets.

It’s the second time in recent history that Google has fended off a breakup attempt from the DOJ. Last year, a federal judge in a separate case that concerned Google’s dominance of the US search market rejected a forced divestiture of its Chrome browser.

But the online ad giant hasn’t gotten off scot-free.

In an order filed in the US District Court for the Eastern…