doccano is an open source text annotation tool for human. It provides annotation features for text classification, sequence labeling and sequence to sequence. So, you can create labeled data for sentiment analysis, named entity recognition, text summarization and so on. Just create project, upload data and start annotation. You can build dataset in hours.

Named entity recognition

First demo is one of the sequence labeling tasks, named-entity recognition. You just select text spans and annotate it. Since doccano supports shortcut key, so you can quickly annotate text spans.


Sentiment analysis

Second demo is one of the text classification tasks, topic classification. Since there may be more than one category, you can annotate multi-labels.


Machine translation

Final demo is one of the sequence to sequence tasks, machine translation. Since there may be more than one responses in sequence to sequence tasks, you can create multi responses.



  • Collaborative annotation
  • Language independent
  • (future) Auto labeling


  • Python 3.6+
  • django 2.0.5+
  • Google Chrome(highly recommended)


To install doccano, simply run:

$ git clone
$ cd doccano
$ pip install -r requirements.txt
$ cd app

First we’ll need to create a user who can login to the admin site. Run the following command:

$ python createsuperuser

Enter your desired username and press enter.

Username: admin

You will then be prompted for your desired email address:

Email address: [email protected]

The final step is to enter your password. You will be asked to enter your password twice, the second time as a confirmation of the first.

Password: **********
Password (again): *********
Superuser created successfully.


Start the development server

Let’s start the development server and explore it.

If the server is not running start it like so:

$ python runserver

Now, open a Web browser and go to You should see the login screen:


Create a project

Now, try logging in with the superuser account you created in the previous step. You should see the doccano project list page:


You should see there is no project.

To create your project, make sure you’re in the project list page and select Create Project button. You should see the following screen:


In project creation, you can select three project types: text classificatioin, sequence labeling and sequence to sequence. You should select a type with your purpose.

Import text items

Now that we’ve created a project. Now you’re at the “dataset” page for the project. This page displays all the documents in the project. You can see there is no documents.

To import text items, select Import Data button in the navigation bar. You should see the following screen:


The text items should be provided in txt format. As of now, it must contain only texts. Each line must contain a text:

EU rejects German call to boycott British lamb.
President Obama is speaking at the White House.
He lives in Newark, Ohio.

Once you select a csv file on your computer, select Upload button.

Define labels

Now we’ll define your labels. To define your labels, select Labels menu. You should see the label editor page:


In label editor page, we can create labels by specifying label text, shortcut key, background color and text color.


Now, we are ready to annotate the texts. Back to the project list page and select the project. You can start annotation!


I hope you are having a great day!