Repository

• NPM

  • npm-name - Check a package name's availability on npm. 
  • pacote - Fetches package manifests and tarballs from the npm registry. 
  • npm-package-arg - Parse the things that can be arguments to `npm install`. 
  • npm-registry-fetch - Like fetch() but for the npm registry 
  • npm-updater - Check update of npm package. 
  • read-pkg-up - Read the closest package.json file. 
  • write-pkg - Write a package.json file. 

• Number

  • Numeral.js - A javascript library for formatting and manipulating numbers. 
  • bignumber.js - A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic. 
  • decimal.js - An arbitrary-precision Decimal type for JavaScript. 
  • big.js - A small, fast JavaScript library for arbitrary-precision decimal arithmetic. 
  • random-js - A mathematically correct random number generator library for JavaScript. 
  • round-to - Round a number to a specific number of decimal places: `1.234` → `1.2`. 
  • unique-random - Generate random numbers that are consecutively unique.
  • random-int - Generate a random integer.
  • random-float - Generate a random float.

• Object / JSON / JSON Schema

  • humps - Underscore-to-camelCase converter (and vice versa) for strings and object keys in JavaScript. 
  • json5 - JSON5 — JSON for humans. 
  • jsondiffpatch - Diff & patch JavaScript objects. 
  • fast-json-stringify - 2x faster than JSON.stringify() 
  • jsonfile - Easily read/write JSON files. 
  • jsonata - JSONata query and transformation language - http://jsonata.org 
  • bson - BSON Parser for node and browser, BSON is short for "Binary JSON," and is the binary-encoded serialization of JSON-like documents. 
  • json-diff - Structural diff for JSON files. 
  • json-mask - Tiny language and engine for selecting specific parts of a JS object, hiding the rest. 
  • strip-json-comments - Strip comments from JSON. Lets you use comments in your JSON files. 
  • json-stringify-safe - Like JSON.stringify, but doesn't throw on circular references. 
  • jsonc-parser - Scanner and parser for JSON with comments. 
  • parse-json - Parse JSON with more helpful errors. 
  • dottie.js - Fast and safe nested object access and manipulation in JavaScript. 
  • load-json-file - Read and parse a JSON file. 
  • write-json-file - Stringify and write JSON to a file atomically. 
  • fast-json-stable-stringify - Deterministic JSON.stringify() - a faster version of @substack's json-stable-strigify without jsonify. 
  • jsonuri - Use URI style methods to operate data. 
  • json-stable-stringify - Deterministic JSON.stringify() with custom sorting to get deterministic hashes from stringified results. 

• OCR

  • tesseract.js - Pure Javascript OCR for more than 100 Languages. 
  • ocrad.js - OCR in Javascript via Emscripten 
  • Parsr - Transforms PDF, Documents and Images into Enriched Structured Data. 

• Office

  • sheetjs - Spreadsheet Data Toolkit(npm: [xlsx](https://www.npmjs.com/package/xlsx)). 
  • exceljs - Excel Workbook Manager. 
  • xlsx-populate - Excel XLSX parser/generator written in JavaScript with Node.js and browser support. 
  • officegen - Standalone Office Open XML files (Microsoft Office 2007 and later) generator for Word (docx), PowerPoint (pptx) and Excell (xlsx) in javascript. The output is a stream. 
  • Mammoth - Convert Word documents (.docx files) to HTML. 
  • docx - Easily generate .docx files with JS/TS with a nice declarative API. Works for Node and on the Browser. 
  • PDFKit - JavaScript PDF generation library for Node and the browser. 
  • percollate - A command-line tool to turn web pages into beautiful, readable PDF, EPUB, or HTML docs. 
  • pdf-lib - Create and modify PDF documents in any JavaScript environment. 
  • pdf2json - A PDF file parser that converts PDF binaries to text based JSON. 
  • nodeppt - This is probably the best web presentation tool so far! 
  • jsPDF - A library to generate PDFs in JavaScript. 

• OS Identification

  • systeminformation - Hardware/software system information. 
  • is-wsl - Detect whether current platform is WSL (Windows Subsystem for Linux). 
  • os-name - Get the name of the current operating system. 
  • getos - Retrieve the current OS, including Linux distribution. 
  • is-windows - Detect whether the current platform is Windows. 

• Parsing

  • marked - A markdown parser and compiler. Built for speed. 
  • markdown-it - Markdown parser with 100% CommonMark support, extensions and syntax plugins. 
  • showdown - A bidirectional Markdown to HTML to Markdown converter written in Javascript. 
  • turndown - An HTML to Markdown converter written in JavaScript. 
  • remove-markdown - Strip Markdown stuff from text. 
  • PapaParse - Fast and powerful CSV (delimited text) parser that gracefully handles large files and malformed input. 
  • node-csv - Full featured CSV parser with simple api and tested against large datasets. 
  • csv-parser - Streaming CSV parser that aims to be faster than everyone else. 
  • neat-csv - Fast CSV parser. Callback interface for the above. 
  • js-yaml - Very fast YAML parser. 
  • yaml - JavaScript parser and stringifier for YAML. 
  • xml2js - XML to JavaScript object converter. 
  • fast-xml-parser - Validate and parse XML. 
  • xmlbuilder - An XML builder for node.js. 
  • js2xmlparser - Popular Node.js module for parsing JavaScript objects into XML. 
  • htmlparser2 - Forgiving HTML and XML parser. 
  • parse5 - HTML parsing/serialization toolset for Node.js. WHATWG HTML Living Standard (aka HTML5)-compliant. 
  • sanitize-html - Clean up user-submitted HTML, preserving whitelisted elements and whitelisted attributes on a per-element basis. Built on htmlparser2 for speed and tolerance. 
  • himalaya - JavaScript HTML to JSON Parser. 
  • PostCSS - CSS parser / stringifier. 
  • less - Less. The dynamic stylesheet language. 
  • pgsql-ast-parser - Yet another simple Postgres SQL parser. 
  • dt-sql-parser - SQL Parsers for BigData, built with antlr4. 
  • clickhouse - NodeJS client for ClickHouse. 
  • node-bplist-parser - Binary plist parser. 
  • ini - An ini parser/serializer in JavaScript. 
  • mathjax-node - MathJax for Node. 
  • readability - A standalone version of the readability library used for Firefox Reader View. 
  • remark - Markdown processor powered by plugins. 
  • remove-markdown - Strip Markdown stuff from text. 

• Performance Optimization

  • v8-compile-cache - Require hook for automatic V8 compile cache persistence 

• Performance Profiling/Analysis

  • Clinic.js - Clinic.js diagnoses your Node.js performance issues. 
  • 0x - Flamegraph profiling. 
  • node-heapdump - Make a dump of the V8 heap for later inspection. 
  • leakage - Write memory leak tests. 
  • flamebearer - Blazing fast flame graph tool for V8 and Node 🔥. 
  • v8-profiler - Node bindings for the v8 profiler. 
  • node-memwatch - A NodeJS library to keep an eye on your memory usage, and discover and isolate leaks. 
  • pidusage - Cross-platform process cpu % and memory usage of a PID. 
  • v8-analytics - V8 engine's cpu & heap-memory analytics. 
  • thetool - Capture different CPU, memory, and other profiles for your app in Chrome DevTools friendly format. 
  • flamegraph - Generates flamegraphs with Node.js or in the browser. 
  • v8-profiler-next - Node bindings for the v8 profiler. 
  • cpu-memory-monitor - CPU & Memory Monitor, auto dump. 

• Process management

  • node-windows - Run scripts as a native Windows service and log to the Event viewer. 
  • PM2 - Advanced Process Manager. 
  • nodemon - Monitor for changes in your app and automatically restart the server. 
  • forever - A simple CLI tool for ensuring that a given script runs continuously. 
  • supervisor - Restart scripts when they crash or restart when a `*.js` file changes. 
  • node-mac - Run scripts as a native Mac daemon and log to the console app. 
  • node-linux - Run scripts as native system service and log to syslog. 
  • current-processes - Node.js library to get a snapshot of the currently running processes, OS-agnostic. 

• RateLimit

  • rate-limiter-flexible - Count and limit requests by key with atomic increments in single process or distributed environment. 

• Real-time

  • Socket.io - Enables real-time bidirectional event-based communication. 
  • ws - Simple to use, blazing fast and thoroughly tested WebSocket client and server for Node.js. 
  • MQTT.js - Client for MQTT - Pub-sub based messaging protocol for use on top of TCP/IP. 
  • SocketCluster - Scalable HTTP + WebSocket engine which can run on multiple CPU cores. 
  • Faye - Real-time client-server message bus, based on Bayeux protocol. 
  • Primus - An abstraction layer for real-time frameworks to prevent module lock-in. 
  • sockette - The cutest little WebSocket wrapper! 🧦 
  • engine.io - The implementation of transport-based cross-browser/cross-device bi-directional communication layer for Socket.IO. 
  • SockJS-node - WebSocket emulation - Node.js server. 
  • nodejs-websocket - A node.js module for websocket server and client. 
  • rpc-websockets - JSON-RPC 2.0 implementation over WebSockets. 
  • deepstream.io - Scalable real-time microservice framework. 
  • isomorphic-ws - Isomorphic implementation of WebSocket. 
  • Kalm - Low-level socket router and middleware framework. 
  • µWebSockets - Highly scalable WebSocket server & client library. 
  • Aedes - Barebone MQTT server that can run on any stream server. 

• RegExp/Glob

  • safe-regex - Detect possibly catastrophic, exponential-time regular expressions. 
  • path-to-regexp - Turn a path string such as `/user/:name` into a regular expression. 
  • minimatch - A minimal matching utility. 
  • micromatch - Highly optimized wildcard and glob matching library. Faster, drop-in replacement to minimatch and multimatch. Used by webpack, babel core, yarn, jest, browser-sync, documentation.js, stylelint, nyc, ava, and many others! 
  • randexp.js - Create random strings that match a given regular expression. 
  • matcher - Simple wildcard matching. 
  • escape-string-regexp - Escape RegExp special characters. 
  • multimatch - Extends minimatch.match() with support for multiple patterns. 
  • execall - Find multiple RegExp matches in a string.

• RPC

  • grpc-js - Pure JavaScript gRPC Client. 
  • thrift - Apache Thrift Node.js. 
  • jayson - Jayson is a simple but featureful JSON-RPC 2.0/1.0 client and server for node.js. 
  • sofa-rpc-node - SOFARPC Node is a high-performance, high-extensibility, production-level Nodejs RPC framework. 

• Sandbox

  • vm2 - Advanced vm/sandbox for Node.js. 
  • sandbox - A nifty javascript sandbox for node.js. 
  • safeify - Safe sandbox that can be used to execute untrusted code. 

• Search Engine/Word Segmentation

  • @node-rs/jieba - jieba-rs binding to Node.js。 
  • elasticsearch-js - Official Elasticsearch client library for Node.js. 
  • nodejieba - NodeJieba provides chinese word segmentation for Node.js based on CppJieba. 
  • elasticsearch-js-legacy - Legacy Elasticsearch client library for Node.js and the browser. 

• Serialization

  • protobuf - Implementation of Protocol Buffers. 
  • snappy - Native bindings for Google's Snappy compression library. 
  • hessian.js - JavaScript hessian binary web service protocol, support communicate with java. 
  • compactr - Implementation of the Compactr protocol. 

• Serverless

  • @midway/faas - Midway FaaS is the Serverless framework used to build Node.js cloud functions. 
  • malagu - Malagu is a Serverless First, componentized, platform-independent progressive application framework based on TypeScript. 
  • serverless - Serverless Framework – Build web, mobile and IoT applications with serverless architectures using AWS Lambda, Azure Functions, Google CloudFunctions & more! 

• Server-side DOM

  • cheerio - Fast, flexible, and lean implementation of core jQuery designed specifically for the server. 
  • jsdom - A JavaScript implementation of various web standards, for use with Node.js. 
  • domino - Server-side DOM implementation based on Mozilla's dom.js. 

• Shell

  • shelljs - Cross-platform Unix shell commands. 
  • execa - Cross-platform implementation of `child_process.{execFile,exec}`. 
  • clipboardy - Cross-platform copy/paste. 
  • gulp-execa - Cross-platform command execution in Gulp.js.
  • zx - A tool for writing better scripts. 
  • shx - Portable Shell Commands for Node. 
  • parallelshell - Run multiple shell commands in parallel. 
  • clipboard-cli - Cross-platform copy/paste. 
  • runscript - Run script easy!
  • cross-spawn-promise - Promisified cross-spawn.
  • shell-exec - Execute a command through the system shell.
  • cross-spawn - Cross-platform implementation of `child_process.spawn()`. 

• Source Code Obfuscator/Protect

  • javascript-obfuscator - A powerful obfuscator for JavaScript and Node.js. 
  • bytenode - A minimalist bytecode compiler for Node.js. it truly compiles your JavaScript code into V8 bytecode, so that you can protect your source code. 

• Static Site Generator & Blogging

  • gatsby - Build blazing fast, modern apps and websites with React. 
  • hexo - A fast, simple & powerful blog framework, powered by Node.js. 
  • vuepress - Minimalistic Vue-powered static site generator. 
  • react-static - A progressive static site generator for React. 
  • gridsome - The Jamstack framework for Vue.js. 
  • vitepress - Vite & Vue powered static site generator. 
  • scully - The Static Site Generator for Angular apps. 
  • netlify-cms - A Git-based CMS for Static Site Generators. 

• Streams

  • event-stream - EventStream is like functional programming meets IO. 
  • through2 - Tiny wrapper around Node streams2 Transform to avoid explicit subclassing noise. 
  • JSONStream - streaming JSON.parse and stringify. 
  • mississippi - A collection of useful stream utility modules for writing better code using streams. 
  • readable-stream - Node-core streams for userland. 
  • pump - pipe streams together and close all of them if one of them closes. 
  • stream-json - stream-json is a collection of node.js stream components for creating custom standard-compliant JSON processors, which requires a minimal memory footprint. It can parse JSON files far exceeding available memory. Even individual primitive data items (keys, strings, and numbers) can be streamed piece-wise. Streaming SAX-inspired event-based API is included as well. 
  • split - Break up a stream and reassemble it so that each line is a chunk. matcher may be a String, or a RegExp. 
  • tar-stream - tar-stream is a streaming tar parser and generator. 
  • node-byline - Line-by-line Stream reader. 
  • multistream - A stream that emits multiple other streams one after another (streams2). 
  • get-stream - Get a stream as a string, buffer, or array. 
  • node-stream-buffer - Readable and Writable Streams that use backing Buffers. 
  • split2 - Split streams3 style. 
  • fstream - Advanced FS Streaming for Node. 
  • pumpify - Combine an array of streams into a single duplex stream using pump and duplexify. 
  • progress-stream - Read the progress of a stream. 
  • merge-stream - Merge multiple streams into one interleaved stream. 
  • duplexify - Turn a writeable and readable stream into a streams2 duplex stream with support for async initialization and streams1/streams2 input.
  • into-stream - Convert a buffer/string/array/object into a stream.
  • merge2 - Merge multiple streams into one stream in sequence or parallel.
  • end-of-stream - Call a callback when a readable/writable/duplex stream has completed or failed.
  • stream-to-promise - Convert streams (readable or writable) to promises.
  • node-streamifier - Converts a Buffer/String to a readable stream.