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JSON Lines (NDJSON) Converter

Convert a JSON array into JSON Lines (one object per line) and back. Used for logs, BigQuery and AI datasets.

Tool inputs stay in your browser · optional AI search sends your query

Good to know: JSON Lines puts one complete JSON value on each line. It is easy to stream and append, so logs and AI training files use it.

How to use it (step by step)

  1. 1Type or paste your text into the “JSON or JSON Lines” box. There is already an example in it so you can see how it works; press Clear to start with your own.
  2. 2Choose your settings: “Direction”.
  3. 3The answer appears right away in the “Result” box. No button needed.
  4. 4Press Copy and paste the result wherever you need it.

Words to know

JSON
A common text format apps use to store and send data, made of names and values in { } brackets.
Array / list
An ordered collection of items, like ["apple", "banana"]. Every programming language has one.
JSON Lines
A file with one JSON record per line, easy to stream and add to.

More in Developer

JSON to SQL INSERT GeneratorCreate an escaped INSERT statement from flat JSON rows.JSON Minifier (Compress JSON)Remove spaces and line breaks from JSON to make it as small as possible.JSON Validator (Find the Error)Check if JSON is valid and see the exact line and column of any mistake, with a tip to fix it.JSON String Escape / UnescapeTurn text into a safe JSON string (\n, \", \\) or turn an escaped string back into normal text.JSON Key Sorter (A–Z)Sort every key in a JSON object alphabetically, at every level, to compare or tidy files.JSON Compare (Diff Two JSON)Compare two JSON documents and list every added, removed and changed value by its path.