"We are here to say that we won't agree to any compromise on our democracy, our rights, our liberal democracy and we are not agreeing to participating in this bluff of compromise with the coalition," said Nava Rozolyo, 36, at a protest march.

One of the main points of contention is the ruling coalition's push for more power in appointing judges, including to the Supreme Court.

Critics see the government's drive as a threat to the court's independence and an attempt at a legal coup. Proponents say it is seeking a less elitist, interventionist bench.

Netanyahu, on trial on corruption charges he denies, says reforms are needed to balance the branches of government. His Likud party and political allies in the far-right have been calling on their political base to stage counter demonstrations.

Israeli media estimated more than 150,000 people attended anti-government protests nationwide on Saturday, the largest in commercial hub Tel Aviv.