Hasty allows you to export your project in the very well-known COCO dataset format. You can find more information about this format here.
Please note that the main COCO project has tasks for object and keypoint detection, panoptic and stuff segmentation, densepose, and image captioning. There are external extensions that include things like attributes, but it is not in the standard one. So, when exporting your project in the COCO format you will not get any attribute data.