Fast CSV Parser and Writer

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library 5.0.5 ·javascript
verified May 27, 2026

fast-csv is a robust and high-performance CSV parser and writer library for Node.js, designed to handle large datasets efficiently. The current stable version is 5.0.5. It generally maintains a steady release cadence, with minor updates and bug fixes appearing every few months, and major versions released less frequently, typically when significant API changes or new features warrant it. Key differentiators include its streaming API, which allows for processing CSV data without buffering the entire file into memory, making it suitable for very large files. It supports both parsing (reading) and formatting (writing) CSV data, offering flexible configuration options for headers, delimiters, quotes, and escape characters, and ships with full TypeScript type definitions.

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