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# Exporting 🤗 Transformers models to ONNX

🤗 Transformers provides a `transformers.onnx` package that enables you to
convert model checkpoints to an ONNX graph by leveraging configuration objects.

See the [guide](../serialization) on exporting 🤗 Transformers models for more
details.

## ONNX Configurations

We provide three abstract classes that you should inherit from, depending on the
type of model architecture you wish to export:

* Encoder-based models inherit from [`~onnx.config.OnnxConfig`]
* Decoder-based models inherit from [`~onnx.config.OnnxConfigWithPast`]
* Encoder-decoder models inherit from [`~onnx.config.OnnxSeq2SeqConfigWithPast`]

### OnnxConfig

[[autodoc]] onnx.config.OnnxConfig

### OnnxConfigWithPast

[[autodoc]] onnx.config.OnnxConfigWithPast

### OnnxSeq2SeqConfigWithPast

[[autodoc]] onnx.config.OnnxSeq2SeqConfigWithPast

## ONNX Features

Each ONNX configuration is associated with a set of _features_ that enable you
to export models for different types of topologies or tasks.

### FeaturesManager

[[autodoc]] onnx.features.FeaturesManager