# IO

Reading and writing your data is crucial for a DataFrame library. In this chapter you will learn
more on how to read and write to different file formats that are supported by Polars.

- [CSV](csv.md)
- [Excel](excel.md)
- [Parquet](parquet.md)
- [Json](json.md)
- [Multiple](multiple.md)
- [Hive](hive.md)
- [Database](database.md)
- [Cloud storage](cloud-storage.md)
- [Google Big Query](bigquery.md)
- [Hugging Face](hugging-face.md)
