December 3, 2018

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Documentation on how to access and use the Quick, Draw! Dataset.

repo name googlecreativelab/quickdraw-dataset
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created 2017-05-09
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The Quick, Draw! Dataset


The Quick Draw Dataset is a collection of 50 million drawings across 345 categories, contributed by players of the game Quick, Draw!. The drawings were captured as timestamped vectors, tagged with metadata including what the player was asked to draw and in which country the player was located. You can browse the recognized drawings on

We’re sharing them here for developers, researchers, and artists to explore, study, and learn from. If you create something with this dataset, please let us know by e-mail or at A.I. Experiments.

We have also released a tutorial and model for training your own drawing classifier on

Please keep in mind that while this collection of drawings was individually moderated, it may still contain inappropriate content.


The raw moderated dataset

The raw data is available as ndjson files seperated by category, in the following format:

Key Type Description
key_id 64-bit unsigned integer A unique identifier across all drawings.
word string Category the player was prompted to draw.
recognized boolean Whether the word was recognized by the game.
timestamp datetime When the drawing was created.
countrycode string A two letter country code (ISO 3166-1 alpha-2) of where the player was located.
drawing string A JSON array representing the vector drawing

Each line contains one drawing. Here’s an example of a single drawing:

    "timestamp":"2017-03-01 20:41:36.70725 UTC",

The format of the drawing array is as following:

  [  // First stroke 
    [x0, x1, x2, x3, ...],
    [y0, y1, y2, y3, ...],
    [t0, t1, t2, t3, ...]
  [  // Second stroke
    [x0, x1, x2, x3, ...],
    [y0, y1, y2, y3, ...],
    [t0, t1, t2, t3, ...]
  ... // Additional strokes

Where x and y are the pixel coordinates, and t is the time in milliseconds since the first point. x and y are real-valued while t is an integer. The raw drawings can have vastly different bounding boxes and number of points due to the different devices used for display and input.

Preprocessed dataset

We’ve preprocessed and split the dataset into different files and formats to make it faster and easier to download and explore.

Simplified Drawing files (.ndjson)

We’ve simplified the vectors, removed the timing information, and positioned and scaled the data into a 256x256 region. The data is exported in ndjson format with the same metadata as the raw format. The simplification process was:

  1. Align the drawing to the top-left corner, to have minimum values of 0.
  2. Uniformly scale the drawing, to have a maximum value of 255.
  3. Resample all strokes with a 1 pixel spacing.
  4. Simplify all strokes using the Ramer–Douglas–Peucker algorithm with an epsilon value of 2.0.

There is an example in examples/nodejs/simplified-parser.js showing how to read ndjson files in NodeJS.
Additionally, the examples/nodejs/ document details a set of command-line tools that can help explore subsets of these quite large files.

Binary files (.bin)

The simplified drawings and metadata are also available in a custom binary format for efficient compression and loading.

There is an example in examples/ showing how to load the binary files in Python.
There is also an example in examples/nodejs/binary-parser.js showing how to read the binary files in NodeJS.

Numpy bitmaps (.npy)

All the simplified drawings have been rendered into a 28x28 grayscale bitmap in numpy .npy format. The files can be loaded with np.load(). These images were generated from the simplified data, but are aligned to the center of the drawing’s bounding box rather than the top-left corner. See here for code snippet used for generation.

Get the data

The dataset is available on Google Cloud Storage as ndjson files seperated by category. See the list of files in Cloud Console, or read more about accessing public datasets using other methods. As an example, to easily download all simplified drawings, one way is to run the command gsutil -m cp gs://quickdraw_dataset/full/simplified/*.ndjson .

Full dataset seperated by categories

Sketch-RNN QuickDraw Dataset

This data is also used for training the Sketch-RNN model. An open source, TensorFlow implementation of this model is available in the Magenta Project, (link to GitHub repo). You can also read more about this model in this Google Research blog post. The data is stored in compressed .npz files, in a format suitable for inputs into a recurrent neural network.

In this dataset, 75K samples (70K Training, 2.5K Validation, 2.5K Test) has been randomly selected from each category, processed with RDP line simplification with an epsilon parameter of 2.0. Each category will be stored in its own .npz file, for example, cat.npz.

We have also provided the full data for each category, if you want to use more than 70K training examples. These are stored with the .full.npz extensions.

Projects using the dataset

Here are some projects and experiments that are using or featuring the dataset in interesting ways. Got something to add? Let us know!

Creative and artistic projects

Data analyses


Guides & Tutorials

Code and tools


May 25, 2017: Updated Sketch-RNN QuickDraw dataset, created .full.npz complementary sets.


This data made available by Google, Inc. under the Creative Commons Attribution 4.0 International license.

Dataset Metadata

The following table is necessary for this dataset to be indexed by search engines such as Google Dataset Search.

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