It connects Louis Blanc in the 10th arrondissement to Pré Saint-Gervais in the 19th arrondisement in the north-eastern part of the city.

Métro Line 7bis serves the Parc des Buttes Chaumont.

The merger with Line 3bis, connected through an existing rail tunnel and allowing the opening of a closed station (Haxo), is being studied.

Line 7bis would be extended one station west to have its terminus at Château-Landon.

The proposed merger of the lines was postponed indefinitely in March 2013.