A palletizing installation comprising: - feed conveyor (1; 1'; 1 ", 1 "') adapted to feed single products, - at least one palletizing device, each arranged to receive products from the feed conveyor and each adapted to stack multiple layers of the products onto a pallet, wherein each palletizing device (10, 20,10',20', 10", 20", 10"', 20"') comprises: - a frame, - a shutter device having a closed state and an opened state, wherein the shutter device in the closed state thereof provides a layer formation surface adapted to form thereon a layer of products, and wherein the shutter device in the opened state thereof allows said layer of products to fall, wherein the shutter device is mounted stationary in the frame, - a pallet lifter comprising: - a pallet lifting table adapted to support a pallet thereon, - a pallet lifting drive adapted to move the pallet lifting table in a vertical range below the shutter device, wherein the pallet lifting table is movable into an upper position and one or more lower positions, wherein in the upper position the pallet on the pallet lifting table is arranged underneath the shutter device so that upon bringing the shutter device in its opened state a layer of products falls and is received on the pallet, and wherein, after receiving a layer of products, the pallet lifting table is movable into a lower position so that layers of products can be stacked onto the pallet, whereby the installation comprises a first palletizing device (10, 10', 10", 10''') and a second palletizing device (20, 20', 20", 20"'), wherein the feed conveyor (1; 1'; 1", 1''') is a linear common feed conveyor adapted to feed single products in succession in a direction of conveyance, preferably at a constant conveyor speed, and characterized in that the first palletizing device and the second palletizing device are arranged alongside the common feed conveyor, the second palletizing device downstream the first palletizing device, preferably in side-by-side arrangement, wherein each palletizing device further comprises: - a row formation platform adapted to form thereon a row of products, which platform is mounted stationary in the frame and has opposed first and second lateral sides, wherein said first lateral side extends adjacent a lateral side of the common feed conveyor and at a height level corresponding to the height level of the common feed conveyor, wherein the platform has a length parallel to said common feed conveyor and a width perpendicular to said length, wherein the row formation platform provides a series of product locations along the length thereof to receive thereon a series of products forming a row of products, and in that the shutter device of each palletizing device is mounted stationary in the frame adjacent said second lateral side of the row formation platform, such that - in the closed state - the layer formation surface is at a height level corresponding to the row formation platform, wherein the width of the row formation platform is smaller than a corresponding width of the layer formation surface, and in that each palletizing device further comprises a product row transfer mechanism that is adapted to slide a row of products from the row formation platform onto the layer formation surface of the shutter device in closed state, and in that the installation further comprises a product ejector system with a controller and one or more product ejector devices controlled by said controller, which one or more product ejector devices are arranged near the row formation platforms and are adapted to eject a product from the common feed conveyor such that the product moves onto a selected product location of said at least two row formation platforms. - feed conveyor (1; 1'; 1 ", 1 "') adapted to feed single products, - at least one palletizing device, each arranged to receive products from the feed conveyor and each adapted to stack multiple layers of the products onto a pallet, wherein each palletizing device (10, 20,10',20', 10", 20", 10"', 20"') comprises: - a frame, - a shutter device having a closed state and an opened state, wherein the shutter device in the closed state thereof provides a layer formation surface adapted to form thereon a layer of products, and wherein the shutter device in the opened state thereof allows said layer of products to fall, wherein the shutter device is mounted stationary in the frame, - a frame, - a shutter device having a closed state and an opened state, wherein the shutter device in the closed state thereof provides a layer formation surface adapted to form thereon a layer of products, and wherein the shutter device in the opened state thereof allows said layer of products to fall, - a pallet lifter comprising: - a pallet lifting table adapted to support a pallet thereon, - a pallet lifting drive adapted to move the pallet lifting table in a vertical range below the shutter device, - a pallet lifting table adapted to support a pallet thereon, - a pallet lifting drive adapted to move the pallet lifting table in a vertical range below the shutter device, - a row formation platform adapted to form thereon a row of products, which platform is mounted stationary in the frame and has opposed first and second lateral sides, wherein said first lateral side extends adjacent a lateral side of the common feed conveyor and at a height level corresponding to the height level of the common feed conveyor, wherein the platform has a length parallel to said common feed conveyor and a width perpendicular to said length,