FTC CodebenchFTC
Java editor and hardware simulator
Write and test FTC Java code without needing a robot. Configure a simulated hardware map, check motor and servo commands, then export or copy your code into OnBot Java.
No downloads or installation required to get started. No Android Studio. No account required. Perfect for beginner FTC teams.
hardwareMap.get(DcMotor.class, "leftDrive")Use the same hardwareMap lookups as
OnBot Java.Configure motors and servos just like you would on your robot controller. Use those names in hardwareMap lookups just like OnBot Java.
Motor, positional servo, and continuous-rotation servo supported.
Write an OpMode in the browser editor. Look up your configured devices beside the code, use the built-in SDK guide, and compile to check for Java errors.
Indentation, formatting, and import assistance included.
Initialize and start your OpMode. Use on-screen controls, a keyboard, or a standard gamepad to check motor power, servo positions, and telemetry without a robot.
Visualize your code moving the right motors and servos.
USE YOUR CODE ON THE ROBOT
Write your OpMode here without a robot. When your robot is available, transfer the Java source to OnBot Java.
Choose Project → Export Java to save your OpMode as a Java source file. Upload it into OnBot Java when connected to your robot.
Copy the source from the Code editor and paste it into a file in OnBot Java. Match the file name to your public class name.
Match the real robot’s configured device names to your hardwareMap lookups, build in OnBot Java, and test on the robot. Copy the code back from OnBot Java to continue programming without the robot.
SIMULATION LIMITS
Codebench shows what your program tells motors and servos to do. It doesn’t model physical motion, collisions, or real sensor feedback.
Some sensor, vision, and Android APIs will not actually be simulated and simply use compatible defaults. FTC Codebench lets you still write code and verify successful compilation, but these APIs will need real hardware.
Explore the built-in SDK guideFAQ
No manual downloads, Java installation, or Android Studio setup are required. Open Codebench in your browser. It loads the editor and Java runtime automatically; the first compilation needs internet and may take a minute. No account is required.
Use Project → Export Java and upload the source file into OnBot Java, or copy the code from the editor and paste it into OnBot Java. You’ll need to connect to your robot to build and run it there. Your simulated hardware map is not transferred; configure matching device names on the real robot.
In this browser’s storage on this device. There’s no cloud sync. Export a project backup before clearing browser data, changing devices, or switching browsers.
Use Enable offline mode inside the app while connected online to download necessary resources. Offline editing is supported; offline Java preparation is experimental. Once prepared, you can continue programming without internet access.
The alpha supports one Java source file with one public OpMode and optional helper classes, using its supported FTC API subset. It isn’t a full Android or Gradle build. The in-app SDK guide explains the supported behavior and compatibility defaults. Multi-file projects are not supported.
FTC Codebench is an independent learning tool and is not affiliated with or endorsed by FIRST. FIRST and FIRST Tech Challenge are trademarks of FIRST.
FTC CODEBENCH
Configure hardware, test your code, and transfer it to OnBot Java.