Put on gloves and goggles. This will protect you from shards of grout flying into your eyes or getting into your hands.
Hold the utility chisel between the grout and the tile. Position the chisel at a 45-degree angle with the grout, which will prevent you from chipping tiles.
Lightly hammer the chisel until the grout pops out. Use as little force as possible to prevent chipping tiles or bricks. You may need to reposition the chisel and hammer the other edge of the grout to remove it.
Chisel and hammer toward an area where you have already removed the grout. This will chip away at the grout without putting excess pressure on the tile.
Continue hammering the grout until you remove all of it. If the grout is old the tile will pop out easily. If the tiles were recently installed, you may have a harder time removing them and the grout.
Brush off any small pieces of grout and grout dust with a stiff-bristled brush. Do not use wire brushes if your tiles are made of natural stone as this will scratch them.