Links audio clips to transcripts or speaker IDs.

Unlike a standard JSON file, a JSONL (JSON Lines) file stores each entry as a single, independent JSON object on its own line. This makes it ideal for massive datasets because it can be processed one line at a time without loading the entire file into memory. Common Uses and Structure

To function correctly within automated pipelines, the file typically requires specific fields: Create an image dataset - Hugging Face

Stores bounding box coordinates and category labels for specific images.

The primary purpose of a metadata.jsonl file is to serve as a bridge between raw files and the labels or captions needed for training AI models.