Rocksi review
A free, open-source way to explore virtual robotics through Blockly.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Rocksi is a free, open-source robotics simulator for programming 3D virtual robots in a web browser. Its Blockly-based visual programming is suited to school classes, university lectures, workshops, and individual learners, with a mixed learner level. Because it runs without registration, downloads, or installation, it can support introductory robotics exploration when access to physical robots is limited. Modern web browsers are supported, along with Windows, Linux, iPhone, iPad, iOS, and Android.
The simulator’s strongest area is its virtual robotics feature set. Rocksi includes documented models from Franka, Niryo NED, Sawyer, and Robotiq Grippers, plus custom robot commands and execution routines. Its inverse-kinematics simulation components give learners a way to examine movement and control concepts beyond basic block sequences. Blockly keeps the coding interface visual, making the product approachable for learners who are not yet working with text-based programming.
Rocksi is most suitable for free 3D simulation experiments, demonstrations, and early robotics concept work. The single Free plan keeps access straightforward, but the published feature set does not include text coding, a verified curriculum, or dedicated classroom tools. Educators looking for structured instructional materials or classroom-management features should consider a different option. Rocksi is a good fit when browser access, open-source availability, and virtual robot experimentation matter more than a complete teaching framework or direct work with physical robots.
Rocksi pros and cons
- Where it wins
- Free access with no registration, download, or installation
- Simulates documented Franka, Niryo NED, Sawyer, and Robotiq models
- Includes custom commands and inverse-kinematics components
- Where it doesn't
- No text-based coding mode
- No verified curriculum or dedicated classroom tools
- Learning centers on virtual robots rather than physical robot access
Rocksi fact sheet, pricing and score →
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