The user can navigate forwards and backwards through all execution steps, and the visualization changes to match the run-time state of the stack and heap at each step.

Python Tutor helps you do programming homework assignments in Python, Java, C, C++, and JavaScript. It contains a step-by-step visual debugger and AI tutor to help you understand and debug code. Start coding online in Python , Java , C , C++ , and JavaScript

Online Python compiler with AI help - the only tool that lets you visually debug your code step-by-step and get AI to help you (also debug JavaScript, Java, C, and C++ code)

Online JavaScript compiler, visual debugger, and AI tutor - the only tool that lets you visually debug your JavaScript code step-by-step (also debug Python, Java, C, and C++ code)

Online C compiler, visual debugger, and AI tutor - the only tool that lets you visually debug your C code step-by-step (also debug Python, JavaScript, Java, and C++ code)

Online Java compiler, visual debugger, and AI tutor - the only tool that lets you visually debug your Java code step-by-step (also debug Python, JavaScript, C, and C++ code)

Python Tutor is a free tool that has been used by tens of millions of people since 2010 to visualize and debug code step-by-step. Despite its name, it also visualizes Java code (in addition to C, C++, and JavaScript) to help students understand …

Despite its name, it also visualizes C and C++ code (in addition to Java and JavaScript) to help students understand critical concepts and debug homework assignments. This article shows instructors how Python Tutor can illustrate key concepts from a wide range of C and C++ courses.