NDJSON puts one complete JSON object on each line with no commas or surrounding brackets, so to get a normal array you parse each line and collect the objects into [ ... ] form. A browser-based NDJSON converter does this on your own device, reporting any line that fails to parse, and the reverse tool turns a JSON array back into newline-delimited records.
Free NDJSON to JSON array converter. Turn newline delimited JSON into a single JSON array, parsing each line and reporting any bad rows clearly.
Open NDJSON to JSON Array → Free toolFree JSON array to NDJSON converter. Turn a JSON array into newline delimited JSON, one compact record per line, ready for streaming and log tools.
Open JSON Array to NDJSON →Newline-delimited JSON, also called JSON Lines, is the natural format for logs, exports and streaming pipelines: each record is complete on its own line, so producers can append and consumers can process line by line without loading everything. But most APIs, fixtures and tools expect a standard JSON array, so converting between the two is routine data plumbing.
The converter parses every line as its own JSON document and assembles the results into one array, and when a line is malformed, a truncated final record is the classic case, it tells you which line failed rather than silently dropping data. The reverse direction takes a JSON array and emits one compact record per line, ready for log tooling or line-oriented processing.
NDJSON files are often database or analytics exports full of real records. The conversion runs entirely in your browser, so the data never leaves your device.
NDJSON has one standalone JSON object per line with no commas or brackets, while an array wraps comma-separated objects in square brackets as one document.
The converter reports which line failed to parse instead of silently skipping it.
Yes. A companion tool converts a JSON array into one compact NDJSON record per line.