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NDJSON to CSV

Universal Format Converter

Convert between CSV, TSV, JSON, and Excel. Supports multiple files, primary data, and batch operations.

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AboutNDJSON to CSV

Convert newline-delimited JSON (NDJSON / JSON Lines) log and pipeline exports into CSV rows, one JSON object per line turned into one row.Category: Conversion & Export
Turning a Kafka topic dump into a spreadsheetReviewing Elasticsearch bulk export dataConverting log pipeline output for analysis
The NDJSON to CSV tool is compatible with:Kafka ConsumersElasticsearch Bulk ExportLog Pipelines. This tool alone can help you manage and analyze your data effectively. However, a composed workflow using CSV TO JSON, MULTIWAY CONVERTER may provide even more powerful data processing capabilities. Consider exploring these related tools for a comprehensive data solution.
NDJSON is the format most log pipelines, Kafka consumers, and Elasticsearch bulk exports use — one complete JSON object per line, instead of one big JSON array. That makes it easy to stream and append to, but not something a spreadsheet can open directly. This converter reads each line as its own JSON object and flattens the set into CSV rows, so a pipeline export becomes something you can sort, filter, and pivot immediately. It also serializes CSV data back into NDJSON, one compact JSON object per line, which is useful when you need to feed edited or filtered data back into a log pipeline or bulk-import API that expects the line-delimited format. Because parsing is just JSON.parse per line, it handles files with hundreds of thousands of records without choking, entirely in your browser.

Frequently Asked Questions:

What is the difference between NDJSON and a regular JSON array?

A regular JSON file has one big array wrapping all records; NDJSON has one independent JSON object per line with no wrapping array or commas between records — that makes it streamable and appendable.

Does this handle nested JSON objects?

Each line is parsed as its own JSON object and used as one row — nested objects and arrays inside a line are kept as-is in that cell rather than being flattened into separate columns.


Developed by HowToCSV for our valued CSV Haters worldwide.