Open Source Packages
Libraries, frameworks, tools, and SDKs used by the apps in this directory — scored the same way as the apps themselves.
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jsonpath-ng
A standard-compliant JSONPath implementation for Python with arithmetic operators, AST manipulation, and in-place updates.
lossless-json
Parse and stringify JSON without losing precision on big numbers
toml-node
A zero-dependency, spec-compliant TOML parser for Node.js with BigInt and Temporal support.
set-cookie-parser
Parse raw Set-Cookie header values into structured JavaScript cookie objects
referencing
Implementation-agnostic JSON reference resolution for JSON Schema, OpenAPI, and beyond
quicktype
Generate strongly-typed models and serializers from JSON, Schema, TypeScript, or GraphQL
Open Policy Agent (OPA)
Open source policy engine for unified authorization and compliance decisions across your stack.
HCL v2
A Go toolkit for parsing, evaluating, and generating HashiCorp's HCL configuration language.
jsondiffpatch
Diff and patch JavaScript objects with compact deltas, smart array diffing, and pluggable output formatters.
sqlparser
Extensible SQL lexer and parser for Rust, conforming to ANSI SQL:2011
node-xlsx
TypeScript-first Excel parser and builder for Node.js, built on SheetJS.
Standard Webhooks (Python)
Python reference implementation for verifying Standard Webhooks HMAC-signed webhook payloads
xml-js
Converts XML text to JavaScript objects or JSON and back, preserving element order.
Peggy
Parser generator for JavaScript using parsing expression grammars (PEG)
configstore
Easily load and persist config without having to think about where and how it's stored on disk.
@cfworker/json-schema
A dependency-free JSON Schema validator built to run inside Cloudflare Workers and other restricted JS runtimes without eval.
strip-json-comments
Strip comments from JSON strings so you can safely use JSONC config files.
yargs-parser
The mighty, standalone option parser powering yargs
error-stack-parser
Cross-browser JavaScript library that parses Error objects into structured stack frames with function names, file paths, and line/column numbers.
x509-parser
A pure-Rust, zero-copy X.509 certificate parser (RFC 5280) built on the nom parser-combinator framework, with optional signature verification.
tinycss2
Low-level CSS Syntax Level 3 parser and generator for Python
json-stable-stringify
A deterministic version of JSON.stringify() that sorts object keys so identical data always produces identical output.
SQLModel
One model for SQLAlchemy and Pydantic, built by the creator of FastAPI to kill duplicate schema code.
lark
A modern parsing toolkit for Python supporting Earley, LALR(1), and CYK parsers with automatic tree construction.
