Newline-Delimited JSON (NDJSON)
Definition
NDJSON stores independent JSON values each in their own line.
A text format where each line is an independent JSON value.
Simply explained
Each line contains a complete data piece and can be processed individually.
Why it matters in practice
An independent JSON value per line allows stepwise processing of exports and events without reading the entire file at once.
Example from business
An export writes one JSON object per event and can be processed line by line.
Limits and pitfalls
- Insert multiline JSON objects or parse NDJSON unchecked as standard JSON.
Origin & history
NDJSON originated as a streamable convention for logs and data exchange; it is not the same as a single JSON array.
Use in mid-sized companies
- Possible application: An export writes one JSON object per event and can be processed line by line.
Frequently asked questions
What does line-by-line JSON data mean?
A text format where each line is an independent JSON value.
Which mistakes should be avoided?
Insert multiline JSON objects or parse NDJSON unchecked as standard JSON.
Sources
Source verified on 10.10.2026. Editorial application examples are hypothetical; no evidence of real customer results.
Editorially reviewed on: