hyparquet-writer

Hyparquet Writer is a JavaScript library for writing Apache Parquet files, focused on being lightweight and fast. Current stable version is 0.15.6, with active development on GitHub under the hyparam organization. It is a companion to the hyparquet reader library. Key differentiators: pure JavaScript with no native dependencies, supports a wide range of Parquet logical types (STRING, JSON, TIMESTAMP, UUID, FLOAT16, GEOMETRY, etc.), automatic type inference, and optional SNAPPY compression. It outputs Parquet files compatible with the Parquet specification.