JSON to NDJSON Converter
ConvertersConvert a JSON array to Newline-Delimited JSON (NDJSON / JSON Lines) instantly in your browser. One element per line. Swap to NDJSON→JSON in one click. Client-side.
JSON → NDJSON
JSONjson
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NDJSONndjson
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Input: 327 chars
About JSON to NDJSON Converter
The JSON to NDJSON converter takes a JSON array and writes each element on its own line — producing Newline-Delimited JSON (`.ndjson` / `.jsonl`). This format is ideal for streaming pipelines, log shipping tools, and Elasticsearch bulk imports. Both editors are live — swap to NDJSON→JSON with one click.
Features
- ✓Bidirectional — edit either panel and the other updates in real time
- ✓Each JSON array element → one compact JSON line
- ✓Top-level JSON objects are also supported (single-element NDJSON)
- ✓Swap direction to NDJSON→JSON with a single click
- ✓Download converted NDJSON as a .ndjson file
- ✓Copy output to clipboard in one click
- ✓100% client-side — data never leaves your browser
Common Use Cases
- Preparing JSON arrays for Elasticsearch bulk API imports
- Splitting JSON arrays into streaming NDJSON for log ingestion
- Generating NDJSON training datasets from JSON arrays for ML pipelines
- Converting JSON API response arrays to NDJSON for Kafka producers
Frequently Asked Questions
QDoes the input have to be a JSON array?
Arrays produce one NDJSON line per element. If a root JSON object is provided it is written as a single-line NDJSON file.
QIs my data sent to a server?
No. All conversion runs in your browser.