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OpenLabeler is an open-source desktop application for annotating objects for AI and deep learning training. It can generate PASCAL VOC XML annotations and uses TensorFlow-based inference to speed up labeling and improve accuracy. Built with OpenJDK/OpenJFX, it offers features like multi-level undo, labeling hints, and pre-built installers for macOS, Linux, and Windows.
AI named OpenLabeling in December 2025.