A removable guidewire funnel tool aids in backloading a catheter onto a guidewire. The guidewire funnel tool includes a pliable loading coupler having a lumen therethrough. The lumen has a tapered distal section that serves to receive a guidewire and a tapered proximal section that receives and couples with a correspondingly tapered distal tip of the catheter. The guidewire funnel tool has a longitudinal slot or area of weakness along the entire length of the loading coupler and a grip tab to enable easy removal of the guidewire funnel tool after the guidewire lumen of the catheter is loading with the guidewire.