---
title: Synthetic Data Generator
short_description: Build datasets using natural language
emoji: 🧬
colorFrom: yellow
colorTo: pink
sdk: gradio
sdk_version: 5.8.0
app_file: app.py
pinned: true
license: apache-2.0
hf_oauth: true
#header: mini
hf_oauth_scopes:
- read-repos
- write-repos
- manage-repos
- inference-api
---
Build datasets using natural language
## Introduction
Synthetic Data Generator is a tool that allows you to create high-quality datasets for training and fine-tuning language models. It leverages the power of distilabel and LLMs to generate synthetic data tailored to your specific needs. [The announcement blog](https://huggingface.co./blog/synthetic-data-generator) goes over a practical example of how to use it.
Supported Tasks:
- Text Classification
- Chat Data for Supervised Fine-Tuning
This tool simplifies the process of creating custom datasets, enabling you to:
- Describe the characteristics of your desired application
- Iterate on sample datasets
- Produce full-scale datasets
- Push your datasets to the [Hugging Face Hub](https://huggingface.co./datasets?other=datacraft) and/or [Argilla](https://docs.argilla.io/)
By using the Synthetic Data Generator, you can rapidly prototype and create datasets for, accelerating your AI development process.
## Installation
You can simply install the package with:
```bash
pip install synthetic-dataset-generator
```
### Quickstart
```python
from synthetic_dataset_generator import launch
launch()
```
### Environment Variables
- `HF_TOKEN`: Your [Hugging Face token](https://huggingface.co./settings/tokens/new?ownUserPermissions=repo.content.read&ownUserPermissions=repo.write&globalPermissions=inference.serverless.write&tokenType=fineGrained) to push your datasets to the Hugging Face Hub and generate free completions from Hugging Face Inference Endpoints. You can find some configuration examples in the [examples](examples/) folder.
Optionally, you can set the following environment variables to customize the generation process.
- `MAX_NUM_TOKENS`: The maximum number of tokens to generate, defaults to `2048`.
- `MAX_NUM_ROWS`: The maximum number of rows to generate, defaults to `1000`.
- `DEFAULT_BATCH_SIZE`: The default batch size to use for generating the dataset, defaults to `5`.
Optionally, you can use different models and APIs. For providers outside of Hugging Face, we provide an integration through [LiteLLM](https://docs.litellm.ai/docs/providers).
- `BASE_URL`: The base URL for any OpenAI compatible API, e.g. `https://api-inference.huggingface.co/v1/`, `https://api.openai.com/v1/`, `http://127.0.0.1:11434/v1/`.
- `MODEL`: The model to use for generating the dataset, e.g. `meta-llama/Meta-Llama-3.1-8B-Instruct`, `openai/gpt-4o`, `ollama/llama3.1`.
- `API_KEY`: The API key to use for the generation API, e.g. `hf_...`, `sk-...`. If not provided, it will default to the provided `HF_TOKEN` environment variable.
SFT and Chat Data generation is only supported with Hugging Face Inference Endpoints , and you can set the following environment variables use it with models other than Llama3 and Qwen2.
- `MAGPIE_PRE_QUERY_TEMPLATE`: Enforce setting the pre-query template for Magpie, which is only supported with Hugging Face Inference Endpoints. Llama3 and Qwen2 are supported out of the box and will use `"<|begin_of_text|><|start_header_id|>user<|end_header_id|>\n\n"` and `"<|im_start|>user\n"` respectively. For other models, you can pass a custom pre-query template string.
Optionally, you can also push your datasets to Argilla for further curation by setting the following environment variables:
- `ARGILLA_API_KEY`: Your Argilla API key to push your datasets to Argilla.
- `ARGILLA_API_URL`: Your Argilla API URL to push your datasets to Argilla.
### Argilla integration
Argilla is an open source tool for data curation. It allows you to annotate and review datasets, and push curated datasets to the Hugging Face Hub. You can easily get started with Argilla by following the [quickstart guide](https://docs.argilla.io/latest/getting_started/quickstart/).
## Custom synthetic data generation?
Each pipeline is based on distilabel, so you can easily change the LLM or the pipeline steps.
Check out the [distilabel library](https://github.com/argilla-io/distilabel) for more information.
## Development
Install the dependencies:
```bash
# Create a virtual environment
python -m venv .venv
source .venv/bin/activate
# Install the dependencies
pip install -e . # pdm install
```
Run the app:
```bash
python app.py
```