LabelImg
lastmod 2026-11-10created 2024-07-053 edits
LabelImg is a desktop annotation tool for labeling images by drawing bounding boxes around objects. It is built with Python and Qt and saves results in PASCAL VOC XML, YOLO text, and CreateML formats, and is used to create training data for object detection models. Its simple, shortcut-driven operation kept it widely used for a long time; development now continues as part of Label Studio, which supports polygons and automatic labeling.