μDSV - A Fast CSV Parser

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library 0.7.3 ·javascript
verified May 27, 2026

uDSV (μDSV) is a lightweight and exceptionally fast JavaScript library for parsing CSV strings, adhering mostly to RFC 4180. Currently at version 0.7.3, it maintains an active release cadence with frequent minor updates. A key differentiator is its "Ludicrous Speed™" performance, consistently outperforming popular alternatives like Papa Parse by 2x-5x across various datasets and parsing configurations, ensuring high speed not just on simplified "happy paths." The library is designed for the 99.5% use-case, minimizing complexity and performance trade-offs, making it ideal for robust, high-throughput parsing. It offers both full and incremental parsing, automatic delimiter detection, schema inference with value typing (`string`, `number`, `boolean`, `date`, `json`), and flexible output formats including arrays, objects, and columnar arrays, all within a compact 5KB (minified) footprint and ships with TypeScript types.

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