Precision Labeling at the Speed of AI.
Say goodbye to manual pixel-by-pixel polygon tracing. With Segment Anything 2 (SAM 2) and automated bounding box assistance, you can generate pixel-perfect masks with a single click.
1-Click Point & Box Prompts
Click inside an object or draw a loose bounding box to extract a tight, clean segmentation mask instantly.
Auto-Prelabeling with AI
Run zero-shot foundation models over entire image sets to produce initial predictions before human review.
Sub-Millisecond Hotkeys
Full keyboard navigation for class switching, rapid bbox creation, undo/redo, and next-image advancement.
Annotation Types Supported
2D Bounding Boxes (Object Detection)
Fast rectangle labeling for YOLOv8/v11/v12, Faster R-CNN, and SSD architectures with corner snapping and label tags.
Polygons & Segmentation Masks
Complex polygonal boundaries for instance segmentation and semantic scene parsing with edge smoothing and node editing.
Experience 10x faster labeling
Free forever for individual developers and small research teams.