RectLabel Pro 4+

for object detection

Ryo Kawamura

    • 4.0 • 5 Ratings
    • $19.99



RectLabel is an offline image annotation tool for object detection and segmentation.

Key features:
Label polygons and pixels using Segment Anything models
Automatic labeling using Core ML models
Automatic text recognition for lines and words
Label polygons with holes
Label cubic bezier curves, line segments, and points
Label oriented bounding boxes in aerial images
Label keypoints with a skeleton
Label pixels with brushes and superpixels
Settings for objects, attributes, hotkeys, and labeling fast
Search object, attribute, and image names in a gallery view
Export to COCO, Labelme, CreateML, YOLO, and DOTA formats
Export indexed color mask image and grayscale mask images
Video to image frames, augment images, etc.

How to use

Privacy policy

Terms of Use

Post the problem to our Github issues page.

Have questions? Send an email to our support team.

Thank you.

What’s New

Version 2024.04.19

- Added "Read images folder recursively" checkbox on the open images folder dialog.

Ratings and Reviews

4.0 out of 5
5 Ratings

5 Ratings

Mohamed ali sterling va ,

Awesome Annotation App

This app has so many capabilities and it's very easy to use. I mainly recommend this app over others becuse it can 1) output in COCO format (Json file), 2) can do keypoint and mask annotations and 3) can overlay depth maps to images. I love how there are so many shortcuts for most actions, and I can always change the shortcuts to my liking. I also use this app with Apple's side car to label on my iPad. I gave a tutorial- "how to use RectLabel" to 8 of my undergrads, and they all thoguht it was intuitive and easy to use. Customer service has been responsive, super helpful and has always addressed a lot of questions/concerns. The app is ALWAYS getting new bells and whistles added to it. The company listens to my feedback/needs and is willing to add new capabilities accordingly. I am very pleased with RectLabel, and would highly recommend it.

SirTmauer ,

Doesn't allow you to change classes

When annotating you cannot change classes. Take the proper steps in the UI and it still won't change the annotations class label. Makes the application useless.

Developer Response ,

Thanks for writing the review and we apologize that changing the object class does not work for you. If you were using 1-click buttons on the label dialog, the problem was fixed in the latest version. For other cases, could you write the problem on our Github issues page?

Best regards,

App Privacy

The developer, Ryo Kawamura, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.