Design Any
Race Circuit
On Earth.
Drop waypoints on any real-world map, close the loop, and get instant lap time estimates, corner counts, speed zone visualisation, and a circuit character rating — calculated automatically for Formula 1, GT3, MotoGP, IndyCar, NASCAR, and Go Kart.
Everything a circuit designer needs.
Real-World Maps
Design on a live dark map or switch to satellite view. Place your circuit anywhere on Earth, from Monaco to your local industrial estate. Starts on the current F1 calendar by default.
Instant Lap Time Estimates
Close the loop and get a calculated lap time, top speed, minimum speed, and average speed. The model accounts for acceleration, braking, and cornering limits specific to each car class.
Six Vehicle Classes
Switch between Formula 1, GT3, MotoGP, IndyCar, NASCAR, and Go Kart profiles. Each has its own lateral acceleration limits, power curves, top speeds, and race distances. Speed zone thresholds rescale per class so the colours stay meaningful for everything from a shifter kart to a stock car.
Speed Zone Visualisation
Once the loop is closed, every segment of the track is coloured by speed: red for full speed, orange for fast corners, yellow for medium, and green for slow. Updates live as you drag waypoints.
Circuit Character Rating
The tool analyses corner density and gives your circuit a character: Ultra Technical, Technical, Balanced, or High Speed. It also counts corners, measures your longest straight, and calculates race laps needed.
30-Step Undo History
Every waypoint placement and drag is tracked. Undo up to 30 steps with Z or Ctrl+Z. Double-click any waypoint to delete it individually. Escape clears the entire circuit.
Export to GPX, KML & XML
Send your circuit to other tools. GPX for sim software and GPS devices, KML for Google Earth, and XML for raw waypoint data. Choose the format from the Settings menu or use the keyboard shortcuts G, K, and X.
Shareable Circuit Links
Generate a URL that encodes your full circuit: every waypoint, map position, zoom level, and whether the loop is closed. Anyone with the link can open and continue editing your design.
24 F1 Circuit Presets
Jump directly to all 24 circuits on the current Formula 1 calendar, from Melbourne to Abu Dhabi. Each preset places the map at the exact zoom and location to start tracing a real circuit.
Track Shaping Tools
Adjust each segment of the tarmac independently with separate left and right widths, draw runoff areas, place kerbs along corners and chicanes, and lay out a pit lane next to the main track. The blue and orange handles on the map let you shape everything by drag.
Satellite View & Visibility Controls
Switch between the dark base map and live satellite imagery. Toggle the map off entirely for a clean screenshot of just your track. Hide waypoint dots, the start/finish label, turn labels, the racing line, or the width handles independently — design the way you want to design.
Custom Turn Labels & Tutorial
Turn labels (T1, T2, T3…) appear automatically at each detected apex, but you can also manually define where a turn starts and ends and give it any name — Eau Rouge, Maggotts, the Corkscrew. An in-app tutorial walks new users through the whole tool the first time they open it.
Six classes. One track tool.
Formula 1
The pinnacle of open-wheel racing. Extreme aerodynamic downforce that increases with speed gives F1 cars a higher cornering limit at high-speed sweepers than at slow hairpins, producing a very different speed profile from GT3 on the same circuit.
GT3
The world's most accessible top-tier class. Less downforce and lower cornering grip than F1 means medium-speed corners are noticeably slower, giving GT3 a different rhythm through the same layout.
MotoGP
Motorcycle racing at its limits. Lower cornering grip than both four-wheeled classes means slow corners are genuinely slow, but an extraordinary power-to-mass ratio makes MotoGP match F1 for top speed on long straights.
IndyCar
Open-wheel racing built for both ovals and road courses. Less downforce-dependent than F1 and with a flatter cornering profile, IndyCar rewards different layouts entirely — high-speed ovals where minimum speed barely drops, or tight street circuits where braking points decide everything.
NASCAR
Heavy stock cars built to lean on each other for 500 km without complaint. Lower cornering grip than the open-wheel classes and a much higher mass make NASCAR loads of fun to push around long sweeping ovals or longer road circuits, with braking zones that demand respect.
Go Kart
A 180 kg shifter kart with 22 kW and no aero to speak of. The speed range is smaller, but the differences between corners are sharper, which is why the speed zone thresholds are scaled down specifically for kart-scale racing. Use it to lay out kart circuits at their natural size.
From blank map to race circuit in minutes.
Choose a starting location
Select from all 24 circuits on the current F1 calendar, or navigate to any point on Earth. The map opens on Monaco by default.
Place and adjust waypoints
Click to place waypoints. The circuit is drawn between them using a smooth Catmull-Rom spline. Drag any waypoint to reshape the track in real time. Double-click a waypoint to delete it. Right-click and drag to pan the map without placing points.
Complete the loop
With 3 or more waypoints placed, press C or click Complete Loop. The circuit closes and the full analysis unlocks: lap time, top and minimum speed, corner count, longest straight, race laps, and speed zone visualisation.
Analyse, export, and share
Switch between F1, GT3, MotoGP, IndyCar, NASCAR, and Go Kart to compare how each class handles your circuit. Press S to copy a shareable link that others can open and edit, or export your design as GPX, KML, or XML from the Settings menu.