Detecting crashes and near-crashes in real-time can greatly benefit traffic safety management, development of safety countermeasures, and naturalistic driving data analysis. This webapp detects/predicts crashes and near-crashes based on kinematic driving data. The model adopts a combination of convolutional neural network (CNN) and gated recurrent unit (GRU) network to capture both local features and temporal dependency of the kinematic signatures. A weighted categorical cross-entropy loss function was used to accommodate the imbalanced data as normal driving segments is substantially more than safety critical events. A window of five seconds will move through the entire streaming data and estimate the probability of crashes, near-crashes, and normal driving at each time point. Several actual crashes, near-crashes, and normal driving events are provided in the demo section. In addition, users can upload their own data for testing.