RectLabel is an offline image annotation tool for object detection and segmentation.
Key features:
Using text and box prompts of Segment Anything Model 3, multiple objects are labeled at once
Label polygons and pixels using Segment Anything Model 2
Label polygons and pixels using Cellpose model
Label bounding boxes using Tracking model
Automatic labeling using Core ML models including RF-DETR and YOLO26
Automatic text recognition for lines and words
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, image names, and memo in a gallery view
Export to YOLO, COCO, CreateML, and DOTA formats
Export indexed color mask image and grayscale mask images
Video to image frames, augment images, etc.
How to use
https://rectlabel.com
Privacy policy
https://rectlabel.com/privacy
Terms of Use
https://rectlabel.com/terms
The standard RectLabel offers subscription plans, $2,99/month and $9.99/year.
RectLabel Pro offers a one-time payment plan, $19.99/one-time.
Both apps can use all features.
This app has not received enough ratings or reviews to display an overview.
Why do I pay again?
Thanhdc247
I was bought your app before you change to a Free app. So Why do I must pay again like a new member? Please I want to refund!
Developer Response
If you bought RectLabel before starting in-app purchase, you can ask us to send the version 1.96 which is just before the in-app purchase.At first, restore purchase from app menu to make the app purchase receipt in your app to the latest one.Then, zip and send RectLabel app(/Applications/RectLabel.app) to support@rectlabel.com.We would check the original app version which you bought, the transaction id for your payment, and the date when your app purchase receipt was updated.If we could confirm, we would send the version 1.96 to you.Before launching the version 1.96, be sure to "Export settings file for the old version" from app menu.Otherwise when you launch the version 1.96, the current settings file would be cleared because the old version cannot read the current format.Import the exported settings file after you launch the version 1.96.The new update version 2.58 was released.https://rectlabel.com/help#version_before_in_app_purchase
- Corresponded to RF-DETR Core ML models.
How to Train a RF-DETR Object Detection Model with Custom Data
https://rectlabel.com/rfdetr_detection
How to Train a RF-DETR Instance Segmentation Model with Custom Data
https://rectlabel.com/rfdetr_segmentation
- Exported split folders became train/valid/test.
- Exported COCO file name became _annotations.coco.json.
- Added "Convert pixels mask to polygon" option when exporting a COCO file.
Version 2026.04.02
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 based, for example, on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Provider
Ryo Kawamura
Size
25.9 MB
Category
Developer Tools
Compatibility
Requires macOS 13.5 or later.
Mac Requires macOS 13.5 or later.
Languages
English and 3 more
English, Japanese, Simplified Chinese, Traditional Chinese