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T-Rex Label

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Browser-based zero-shot labeling tool for CV teams needing fast bounding-box and segmentation annotation without fine-tuning.

What it does

T-Rex Label is a browser-based annotation tool built on an open-set detection model. Users draw a box or prompt around one object and it automatically finds and labels similar objects across an image set without any fine-tuning.

Core features

Zero-shot open-set object detection, no fine-tuning needed
One-prompt batch annotation across multiple images
Smart segmentation and bounding-box tools
Cross-image reasoning to replicate a single annotation prompt
No install, fully browser-based
Import/export compatible with Kaggle, Roboflow, Hugging Face, Label Studio, and common ML frameworks

Best for

Computer vision engineers building datasets for rare or novel object classes
Agriculture, retail, or logistics teams labeling domain-specific imagery
Teams wanting fast dataset creation without maintaining custom-trained annotators
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