AceThinker Free Online Video Cropper is a free and secure web-based video cropping tool that allows you to crop your video online to change the aspect ratio so as to fit any player, device, or social media platform like YouTube, Facebook, Instagram, TikTok, Twitter, etc. Or to remove the black borders of the video, get rid of the watermarks on the video, etc. Upload your video and follow the intuitive interface to crop the video as you need.