NDJSON Chunk Parser
A micro-library of stream components for building custom JSON and JSONC processing pipelines with a minimal memory footprint — parse, filter, and transform JSON far larger than available memory with a SAX-inspired token API, on Node.js or Web Streams.
minimal implementation of a PassThrough stream
Streaming HTML parser with scripting support.
Pure Javascript JSON to CSV converter.
Streaming newline delimited json parser + serializer
A set of efficient utilities that extend the use of JSON (streaming, estimate size, NDJSON/JSONL, etc.)
Zero-dependency SSE and NDJSON stream parser with AI API adapters (OpenAI, Anthropic, Gemini, Ollama)
Big-friendly JSON. Asynchronous streaming functions for large JSON data sets.
Node.js Transform and Async interface to convert JSON into CSV.
Streaming, source-agnostic EventSource/Server-Sent Events parser
Option parsing for Node, supporting types, shorthands, etc. Used by npm.
Generic interruptible "parser" mixin for Transform & Writable streams
TypeScript definitions for ndjson
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CSV parsing implementing the Node.js `stream.Transform` API
git-log-parser
tar-stream is a streaming tar parser and generator and nothing else. It operates purely using streams which means you can easily extract/parse tarballs without ever hitting the file system.
WHATWG Transform and Async interface to convert JSON into CSV.
Import documents to a Sanity dataset
MermaidJS parser
An evented streaming XML parser in JavaScript
Parse and compile gettext po and mo files to/from json, nothing more, nothing less
Prettifier for Pino log lines
Fibrio parses large JSON array, NDJSON, and CSV inputs record by record without loading the full source into memory.
SmarterJSON is a permissive JSON/JSON5 parser: comments, trailing commas, different quote styles, Python/JS keywords, and more, all parse to the same Ruby objects. Purposely no strict mode, always best-effort, blazing fast. Handles BOM, smart quotes, messy input. Compatible with config/data files and API responses alike.