Converting Large JSON, NDJSON, CSV and XML Files without Blowing Up Memory

📰 Dev.to · Bruno Hanss

Learn to convert large JSON, NDJSON, CSV, and XML files without running out of memory

intermediate Published 14 Feb 2026
Action Steps
  1. Read large files in chunks using Node.js streams
  2. Use libraries like json-stream-parser or ndjson to parse JSON and NDJSON files
  3. Utilize csv-parser for CSV files and xml2js for XML files
  4. Apply transformation functions to each chunk of data
  5. Write the transformed data to a new file or database
Who Needs to Know This

Developers and data engineers who work with large datasets can benefit from this knowledge to improve their data processing workflows

Key Insight

💡 Processing large files in chunks using streams can prevent memory overflow

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📊 Got large JSON, NDJSON, CSV, or XML files? Learn how to convert them without blowing up memory! 💻

Key Takeaways

Learn to convert large JSON, NDJSON, CSV, and XML files without running out of memory

Full Article

Most of us have written something like this at some point: const data =...
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