RectLabel for object detection

RectLabel for object detection

Mac OS Developer Tools

Own Wish Buy Buy

An image annotation tool to label images for bounding box object detection and segmentation.

Key features:
Drawing bounding box, polygon, and cubic bezier
Export index color mask image and separated mask images
1-click buttons make your labeling work faster
Customize the label dialog to combine with attributes
Settings for objects, attributes, hotkeys, and labeling fast
Search images whose labels include keywords
Layer order for overlapped boxes
Quick zoom to existing boxes
Support the PASCAL VOC format

The details are described on our support page.

License policy:
You can use RectLabel to develop the commercial object detection system.

Found some problems?
Post the problem to our Github issues page

Have questions?
Send an email to

Thank you.

Show More...

What's New

- Added "Rotate image" feature.
When you are in the "Rotate" mode and drag upper or lower on the image, you can rotate the image by 90 degrees step and save it.
- Adjusted UI for the macOS Mojave.

My Rating

App Store Rating