NDJSON / JSON Lines Formatter
Parses each nonblank line as JSON and displays numbered, indented values. The result is inspection text, not valid JSON or NDJSON.
About this ndjson / json lines formatter
Parses each nonblank line as JSON and displays numbered, indented values. The result is inspection text, not valid JSON or NDJSON Transforms and validates developer data structures locally, preventing confidential payload exposure during data wrangling.
Syntax parsing & data transformation logic
Trims and skips blank lines, parses each remaining line as an independent JSON value, and prints a one-based line number before its indented serialization. The displayed output is not a JSON array or valid NDJSON.
Worked conversion & output example
Scenario: Format two independent JSON Lines records.
Sample input:
Processing: Ignore no nonblank records here; parse each line independently and prefix its one-based line number.
Illustrative output:
Syntax constraints & input size limits
Any invalid nonblank line stops conversion. The output includes `1:`, `2:` prefixes and is not a JSON array or valid NDJSON; no file streaming or schema validation is provided.
Data conversions and formatting in NDJSON / JSON Lines Formatter reflect standard structured syntax. Verify parsed outputs against your target runtime before deployment.
Local client execution boundary
Data parsing and transformations in NDJSON / JSON Lines Formatter execute in the local browser tab without remote data transmission.
Data format specifications & language standards
Data interchange formats and language grammar specifications:
- RFC 8259 (The JavaScript Object Notation Data Interchange Format)
- ECMA-404 (The JSON Data Interchange Standard)
NDJSON / JSON Lines Formatter verification · Audit standards
How to use it
- Paste newline-delimited JSON values into the input.
- Trim each line, skip blank lines and parse every remaining line independently as strict JSON.
- Read numbered, indented entries; copy only as inspection text, not valid JSON or NDJSON.
Frequently asked questions
How does NDJSON Formatter process lines?+
It splits primary text at line endings, trims each line, discards empty lines, then strictly parses every remaining line as an independent JSON value. Each successful value is JSON-serialized with a one-based line number.
How are two NDJSON records formatted?+
`{"id":1}` and `{"id":2}` produce separate numbered entries beginning `1:` and `2:`. Each nonblank line is parsed independently; they are not combined into one array.
How are errors and blank lines handled?+
Blank or whitespace-only lines do not produce an entry. Any nonempty line that fails strict interchange JSON parsing stops the conversion rather than being silently skipped or repaired.
What NDJSON features are outside scope?+
It is a formatter, not a schema validator, stream reader, file importer, query engine, record merger, duplicate-key policy editor, or lossless source-layout preservation tool.