JSON Lines to JSON Converter
Convert JSON Lines to JSON arrays, convert NDJSON to JSON, inspect each record, or turn JSON arrays back into newline-delimited JSON locally in your browser.
Paste one JSON value per line, newline-delimited records from logs or exports, or a JSON array you want to turn into JSONL.
Conversion Settings
Options
These options help clean pasted JSONL, keep source line references, and make exported data easier to review before copying it elsewhere.
Converting JSON Lines and NDJSON Into Usable JSON
JSON Lines and NDJSON files store one JSON value per line. This format is common in logs, exports, streaming APIs, analytics events, queues, and data pipelines because each record can be processed independently.
This converter helps turn newline-delimited records into a normal JSON array, inspect line-by-line parse problems, or convert a JSON array back into compact JSON Lines for tools that expect one record per line.
It is useful when a tool expects regular JSON but your source data is in JSONL or NDJSON, or when a pipeline needs one compact JSON record on each line.
When This JSONL and NDJSON Converter Helps
Turning log exports, analytics events, or streamed API records into a JSON array you can inspect or share.
Checking which line in a JSONL or NDJSON file is broken before importing it into another tool.
Converting a JSON array into newline-delimited records for pipelines, data scripts, queues, and command-line workflows.
Creating Markdown, CSV, or checklist summaries before copying the data into documentation, pull requests, or issue reports.
Converting newline-delimited JSON from CLI tools, database exports, and event streams into readable JSON.
How to Use the JSON Lines to JSON Converter
- Paste JSON Lines, NDJSON, or a JSON array into the input box.
- Choose whether to convert JSONL to a JSON array, convert an array to JSONL, or inspect records.
- Select how invalid lines and empty lines should be handled.
- Use the options to keep line numbers, sort object keys, or wrap records in an object.
- Review the output and line inspection table before copying the result.
Example JSON Lines to JSON Conversion
JSON Lines input:
{"id":1,"event":"page_view"}
{"id":2,"event":"scroll"}
{"id":3,"event":"conversion"}JSON array output:
[
{
"id": 1,
"event": "page_view"
},
{
"id": 2,
"event": "scroll"
},
{
"id": 3,
"event": "conversion"
}
]JSON Lines and NDJSON Are Not the Same as One Big JSON File
A normal JSON document has one top-level value, often an object or array. JSON Lines and NDJSON use separate JSON values on separate lines. That makes the format convenient for large streams and append-only logs, but many tools need it converted into an array before they can read it.
Frequently Asked Questions
What does a JSON Lines to JSON converter do?
It converts one-JSON-value-per-line text into a JSON array, or converts a JSON array back into newline-delimited JSON records.
Is JSON Lines the same as NDJSON?
They are commonly used to describe the same style of newline-delimited JSON records. Each non-empty line should contain one valid JSON value.
Why would I convert JSONL to a JSON array?
Many editors, API tools, and data viewers expect one normal JSON document. Converting JSONL to a JSON array makes those records easier to inspect, copy, and reuse.
Can this find the broken line in a JSONL file?
Yes. The line inspection table shows which lines parsed successfully and which lines have JSON parse errors.
Can I convert a JSON array into JSON Lines?
Yes. Choose the JSON array to JSON Lines action and the tool will output one compact JSON value per line.
Is anything uploaded while converting JSON Lines?
No. The conversion runs entirely inside your browser.