JSONL to JSON Converter

APIs are inconsistent about payload shape. One service accepts a JSON array for bulk updates, while another ingestion endpoint expects newline-delimited objects for streaming. When you must move data between two such systems, converting between the two representations is a prerequisite, not a choice. Joining JSONL lines into a JSON array satisfies array-based REST bulk endpoints, and splitting an array back to lines lets you stream records to a log processor or load them one object at a time without reading the whole file into memory.

Large exports that arrive as a single JSON array can choke editors and text tools that read files line by line. Splitting the array into JSONL gives you one record per line, which means you can grep a million records, process them with standard streaming tools, and resume interrupted jobs without re-parsing everything. Conversely, when a line-delimited export needs to become a single document for a schema validator or a document-oriented database, joining the lines into an array is the reliable one-shot transformation.