Newline-Delimited JSON (NDJSON) Specification
Standard JSON arrays require parsing the entire document into memory at once. NDJSON allows real-time data streaming (log aggregators, Elasticsearch, BigQuery) because every line is an isolated JSON object.
Frequently Asked Questions
What is NDJSON / JSON Lines?
JSON Lines (NDJSON) is a file format where each line is a valid individual JSON value separated by a newline character (\n). It is widely used for streaming log files, big data pipelines, and database dumps.
How does line-by-line NDJSON validation work?
Our validator splits the input by newline breaks and evaluates each line independently, reporting exact line numbers where invalid JSON syntax or empty lines occur.
Can I convert an NDJSON file into a JSON Array?
Yes! The built-in converter transforms multi-line NDJSON files into a standard single JSON array ([{...}, {...}]) or vice versa.