Image Labeling Tool

Every computer vision data scientist has once needed to quickly label an image dataset. We present you with an image labeling tool that is simple and easy to use.

What is Tagias Labeling Tool

Tagias Labeling Tool is a free to use online image labeling tool. Since this is a web tool, it does not require any installation — just a web browser. The application works under various operating systems: Linux, Windows, macOS.

The tool allows for Bounding Boxes, Polygons, Classification, and Keypoints. You can label an unlimited number of images for free without any restrictions. The user interface is simple and easy to use. All the annotations are contained in one JavaScript Object Notation (JSON) file.

Here is a step-by-step guide to using Tagias Free Image Labeling Tool.

Get started

You start by logging in using your Google account. Using the Google log-in allows you to keep your labeling results. If you need to pause and continue later, you can pick up where you left off.
Labeling tool

Create the project

Since there are no restrictions in the Tagias Labeling Tool, you will probably label more than one dataset. You can create any number of projects at your convenience.

There are two ways to add images to the project. If you host your dataset, you can upload a text (txt) file with the list of links. One line - one link. Or, if you want to upload the images, just drag-n-drop files. You can upload 50 images at a time (max. 6mb/img).

You can add more images to the project at anytime and mix both methods for each project.
Labeling project

Image labeling

You don't have to create a class names list for your project. After you put the first label, a drop-down menu will appear, which prompts you to enter the first class name. Every time you can add a new class or choose from the list of classes you added before.
Image for labeling
Bounding Boxes and Classification

Get JSON result

When you have labeled all the project images, click on the "Get JSON result" button. You can return to the project at any time you need to and continue working. You can add or remove images, continue or change the annotations, or delete the project if you're finished. We never keep your data for any purpose, and after you have deleted the project's images or the entire project, it will be automatically deleted from our server.
Json result
Get JSON result

Take advantage of our free and easy to use image labeling tool


Free Trial

We would be grateful for any feedback. If you think we can improve the interface or you need more features, please contact us.