Trace: Learn to think in Code.

Reading code is a skill. Train it.

Trace is a fast-paced coding game designed to sharpen your programming intuition: the ability to look at code, mentally follow what it does, and reach the answer quickly.

Instead of watching another tutorial or memorizing syntax, you practice by doing. Trace gives you short Python programs to read and mentally execute. Work out the result, enter your answer, and move straight to the next challenge.

Practice in 3-minute runs

Race against the clock and solve as many challenges as you can. Sessions are deliberately short, so you can get meaningful practice whenever you have a few minutes.

Challenges that grow with you

Trace adapts the challenge selection as you gain experience, introducing more demanding problems as your skills develop. The goal isn't to memorize questions. It's to become quicker and more confident at reasoning through unfamiliar code.

Build real code-reading instincts

Practice tracing variables, loops, conditions, functions, collections and other Python concepts while developing the mental execution skills programmers use when reading and debugging code.

Race your past self with Ghost

Ghost mode turns practice into a race against your previous performance. See if today's you can beat yesterday's you.

Track your progress

Earn XP, build streaks, level up and see how your performance develops over time.

Whether you're learning Python, preparing for coding interviews, or simply want to get faster at understanding code, Trace gives you a different way to practice.

Don't just learn to write code. Get good at reading it.