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

Key features:
Drawing bounding box, polygon, cubic bezier, line, and point
Label the whole image without drawing boxes
Label pixels with brush and superpixel tools
Export index color mask image and separated mask images
Export to the YOLO, COCO JSON, and CSV format
Read and write in the PASCAL VOC XML format
Automatically label images using Core ML model
Auto-suggest speeds up selecting the object name
Customize the label dialog to combine with attributes
1-click buttons make your labeling work faster
Settings for objects, attributes, hotkeys, and labeling fast
Search images by label text
Convert video to image frames

The details are described on our support page.

RectLabel has Paid Subscriptions.

Title of service: Full App(1 Month)
Length of free trial: 1 Month
Length of subscription: 1 Month
Price of subscription: $2.99 per Month

Title of service: Full App(1 Year)
Length of free trial: 1 Month
Length of subscription: 1 Year
Price of subscription: $29.99 per Year

Payment will be charged to your Apple ID account after the 1 month free trial.
Subscription automatically renews unless it is canceled at least 24 hours before the end of the 1 month free trial.
Your account will be charged for renewal within 24 hours prior to the end of the 1 month free trial.
You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase.
Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.

Privacy policy:

Terms of Use:

Post the problem to our Github issues page.

Have questions?
Send an email to

Thank you.

What’s New

Version 3.00.2

- Made pixels features open to existing users.
- Fixed problems when label names are empty.
- Fixed problems when you change object colors.

Ratings and Reviews

3.5 out of 5
32 Ratings

32 Ratings

Innov8now ,

Very good software but needs export customization to make perfect

I was there was a way to customize export options, for example how to layout the columns and how to format the coordinates of bounding boxes. I always have to open in excel and do complex methods to calculate image pixel dimensions then subtract RectLabel coordinates to get the correct coordinates I need for TF, Keras and OpenCV training.

Developer Response ,

Thanks for your review.

Currently the CSV format is for Turi Create.
Could you show us the format which is used on TF, Keras and OpenCV training?

For TF, we are providing a sample python code to convert to the TFRecord file.

Hazeo ,

Developer is deceptive and greedy

I echo other reviewers’ anger on the developer’s deception and greed, and cannot recommend this despite it being a simple but useful program.

We are forced to pay a 'new full price’ on an app we had purchased in order to continue using it. Us early adopters helped you by pushing the app up on the rankings, and making us pay more for using the same features is very poor practice. This is like buying a product on sale, then later asked to pay the full price. With my own iOS app which I increased price over time I DID NOT ask existing users to pay more. Loss of revenue is completely acceptable in this case.

If you want to charge for continued development, which is understanable, make new features as an in-app purchase without forcing existing users to pay more to use features they had access to before. This is very deceptive.

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/ to
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.

bw4sz ,

Friendly Support

There have been some negative reviews on the app because of the change in price model. I've been using the tool for a year and found it extremely helpful and reliable. Worth the money, even if they charged you 1$ at first. Not a big deal. I can also say that i've twice submitted issues on the github repo and the developers were quick to add features.


Ryo Kawamura
16.3 MB

OS X 10.10 or later, 64-bit processor



Age Rating
In-App Purchases
  1. Full App $59.99
  2. Full App from $0 $49.99
  3. Full App from $1.99 $49.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.