Datui is a terminal user interface for exploring and analyzing tabular data. It reads files stored locally, on S3 or Google Cloud Storage, or over HTTP/HTTPS, and supports the Parquet, CSV, JSON, Avro, Arrow, ORC and Excel formats. Data is queried with SQL and transformed using streaming expressions backed by Polars, so files larger than memory can be browsed interactively. Charts and summary statistics are rendered directly in the terminal.