Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
All Packages
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JSZip
Create, read, and edit ZIP files directly in JavaScript, in the browser or Node.js.
PapaParse
The fastest in-browser CSV parser for JavaScript, with streaming, Web Workers, and zero dependencies
qs
A battle-tested querystring parser and serializer for Node.js with nested object support and built-in security limits.
buffer
The Node.js Buffer API, reimplemented for the browser on top of Uint8Array.
mime-types
The ultimate JavaScript content-type utility for resolving MIME types from file extensions and paths.
body-parser
Node.js body-parsing middleware that turns raw HTTP request bodies into ready-to-use req.body objects.
superjson
Serialize JavaScript to a superset of JSON that keeps Dates, Maps, Sets, BigInts, and more intact.
gray-matter
Fast, dependable front-matter parser for YAML, JSON, TOML, and CoffeeScript metadata blocks
cookie
Basic HTTP cookie parser and serializer for HTTP servers, with zero dependencies and full RFC 6265 support.
node-xml2js
XML-to-JavaScript-object parser and builder for Node.js
protobuf.js
A fast, conformant JavaScript and TypeScript implementation of Protocol Buffers, no protoc required
smol-toml
A small, fast, spec-compliant TOML parser and serializer for JavaScript
SheetJS (xlsx-republish)
A drop-in npm mirror of the SheetJS Community Edition for reading and writing spreadsheets.
Protobuf-ES
A conformance-tested, ESM-first Protocol Buffers runtime and code generator for modern JavaScript and TypeScript.
@xmldom/xmldom
A pure JavaScript, W3C-standard DOMParser and XMLSerializer for parsing and building XML/HTML documents
json-2-csv
Converts arrays of JSON documents to RFC 4180 compliant CSV and back, with native support for nested sub-documents.
Apache Arrow JS
The official JavaScript/TypeScript implementation of Apache Arrow's columnar in-memory format for fast, zero-copy data interchange.
feed
Generate RSS 2.0, Atom 1.0, and JSON Feed 1.0 syndication feeds from a single TypeScript API.
toml-node
A zero-dependency, spec-compliant TOML parser for Node.js with BigInt and Temporal support.
xml-js
Converts XML text to JavaScript objects or JSON and back, preserving element order.
FlatBuffers
Google's memory-efficient, zero-copy serialization library for cross-language data exchange
yaml.js
Standalone JavaScript YAML 1.2 parser and encoder for Node.js and browsers, with yaml2json and json2yaml command-line tools.
serde-wasm-bindgen
Native integration of Serde with wasm-bindgen for fast Rust-to-JavaScript value conversion
sourcemap
A Rust library for parsing, generating, and rewriting JavaScript sourcemaps, built and maintained by Sentry.
