NDJSON to JSON Converter - free, no upload

Convert NDJSON to JSON

Gathers the lines back into a single JSON array. This is what you do when a streaming file needs to go into a tool that expects one well-formed document rather than a sequence of them.

Drop NDJSON file(s) to start

or click to browse

What is NDJSON?

One JSON object per line, with no wrapping array. That small change is the whole point: a program can read a record at a time instead of parsing gigabytes into memory first, which is why log pipelines, bulk importers and search indexes all speak it.

What is JSON?

The format the web runs on. Nested objects and arrays, real types, and a syntax small enough to fit on a postcard. It maps badly onto a grid, which is why converting deeply nested JSON to a spreadsheet always involves losing something.

Your files never leave your device · no magic required