Label Studio

What is Label Studio?

Label Studio is an open source data labeling tool that supports multiple projects, users and data types in one platform. It allows you to do the following:

  • Perform different types of labeling with many data formats.

Label Studio is also available an Enterprise cloud service with enhanced security (SSO, RBAC, SOC2), team management features, analytics & reporting, and support SLAs. A free trial is available to get started quickly and explore the enterprise cloud product.


When you upload data to Label Studio, each item in the dataset becomes a labeling task. The following table describes some terms you might encounter as you use Label Studio.

Project List Screenshot

Data Manager Screenshot

Quick View Screenshot
Term Description
Dataset What you import into Label Studio, comprised of individual items, or labeling tasks.
Task A distinct item from a dataset that is ready to be labeled, pre-annotated, or has already been annotated. For example: a sentence of text, an image, or a video clip.
Region The portion of the task identified for labeling. For images, an example region is a bounding box. For text, an example region is a span of text. Often has a label assigned to it.
Labels What you add to each region while labeling a task in Label Studio.
Relation A defined relationship between two labeled regions.
Result A label applied to a specific region as stored in an annotation or prediction. See Label Studio JSON format of annotated tasks.
Annotations The output of a labeling task. Previously called “completions”.
Annotations in Label Studio format that machine learning models create for an unlabeled dataset. See import pre-annotations
Templates Example labeling configurations that you can use to specify the type of labeling that you’re performing with your dataset. See all available templates
Tags Configuration options to customize the labeling interface. See more about tags.

Labeling workflow

Start and finish a labeling project with Label Studio by following these steps:

  1. Create accounts for Label Studio. Create an account to manage and set up labeling projects.
  2. Restrict access to the project. Set up role-based access control. Only available in Label Studio Enterprise Edition.
  3. Set up the labeling project. Define the type of labeling to perform on the dataset and configure project settings.
  4. Set up the labeling interface. Add the labels that you want annotators to apply and customize the labeling interface.
  5. Import data as labeling tasks.
  6. Label and annotate the data.
  7. Review the annotated tasks. Only available in Label Studio Enterprise Edition.
  8. Export the labeled data or the annotations.


You can use any of the Label Studio components in your own tools, or customize them to suit your needs. Before customizing Label Studio extensively, you might want to review Label Studio Enterprise Edition to see if it already contains the relevant functionality you want to build. See Label Studio Features for more.

The component parts of Label Studio are available as modular extensible packages that you can integrate into your existing machine learning processes and tools.

Module Technology Description
Label Studio Backend Python and Django Use to perform data labeling.
Label Studio Frontend JavaScript web app using React and MST Perform data labeling in a user interface.
Data Manager JavaScript web app using React Manage data and tasks for labeling.
Machine Learning Backends Python Predict data labels at various parts of the labeling process.

Information collected by Label Studio

Label Studio collects anonymous usage statistics about the number of page visits and data types being used in labeling configurations that you set up. No sensitive information is included in the information we collect. The information we collect helps us improve the experience of labeling data in Label Studio and helps us plan future data types and labeling configurations to support.