label-studio and labelImg
About label-studio
HumanSignal/label-studio
Label Studio is a multi-type data labeling and annotation tool with standardized output format
Supports active learning workflows by integrating ML models for automated pre-labeling and interactive predictions through a backend service API. Built on Django with a React frontend, it offers flexible storage backends (SQLite, PostgreSQL, S3/MinIO) and exports annotations in framework-specific formats for direct use in ML pipelines.
About labelImg
HumanSignal/labelImg
LabelImg is now part of the Label Studio community. The popular image annotation tool created by Tzutalin is no longer actively being developed, but you can check out Label Studio, the open source data labeling tool for images, text, hypertext, audio, video and time-series data.
Built with PyQt for its graphical interface, LabelImg outputs bounding box annotations in multiple formats—PASCAL VOC (ImageNet standard), YOLO, and CreateML—enabling compatibility with diverse computer vision pipelines. The tool supports batch processing via directory loading, predefined class lists, and annotation visualization by loading existing label files alongside images, streamlining workflows for dataset preparation.
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