Merge Data with JSON Lines Data

Merge data with your JSON Lines / NDJSON data quickly

Drop your JSON_LINES (.jsonl) file here (or click to browse).
(100 MB or less file)
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Merge Data Tools JSON Lines Tools
Convert JSON Lines using an API
Merge Data

Merging stacks your JSON Lines / NDJSON file together with one or more datasets, appending their records underneath so everything lands in one table. The result includes every column found across all datasets, and you choose which column from each dataset fills each one. Perfect for combining exports from different periods, regions, or systems into a single dataset.

JSON Lines / NDJSON

JSON Lines (also known as NDJSON — Newline Delimited JSON) is a text format where each line is a self-contained, valid JSON value, typically a JSON object. It is widely used for streaming data, log files, and large data exports because files can be read and written one record at a time without loading the entire document into memory. Common file extensions are .jsonl and .ndjson.