AFP journalists reported scuffles between police and protesters in the afternoon, after hours of calm, as police used anti-riot grenades and tear gas to disperse marchers in the centre of the French capital.
Police headquarters reported 126 arrests and 11,000 checks on individual protesters.
Paris seemed to bear the brunt of Saturday's protests, but other French cities were also expecting demonstrations.
Earlier this month, French President Emmanuel Macron signed into law legislation that gave security forces greater powers at demonstrations but which opponents claimed violated civil liberties.
One measure banned protestors from covering their faces, but France's Constitutional Council, its highest constitutional authority, refused to give its green light to one of the most contentious parts of the legislation.
It would also have given the authorities the power to ban from demonstrations any individual "posing a particularly serious threat to public order".
The "yellow vest" movement is demanding changes to the government's social and fiscal policies.
Published : April 20, 2019
By : Agence France-Presse Paris