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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Ajv
The fastest JSON Schema validator for Node.js and the browser, compiling schemas straight into executable validation code.
gray-matter
Fast, dependable front-matter parser for YAML, JSON, TOML, and CoffeeScript metadata blocks
passport-jwt
A Passport.js strategy for authenticating requests using JSON Web Tokens
Partial JSON
Parses incomplete JSON strings streamed token-by-token from an LLM into usable JavaScript values as they arrive.
json_repair
Repair malformed JSON from LLMs, APIs, logs, and user input — a drop-in fallback for json.loads().
msgspec
A fast, zero-cost serialization and validation library for JSON, MessagePack, YAML, and TOML in Python.
fast-safe-stringify
Fast JSON.stringify drop-in that safely handles circular references
xml-js
Converts XML text to JavaScript objects or JSON and back, preserving element order.
jsonata
A lightweight query and transformation language for filtering, mapping, and reshaping JSON data with concise, path-based expressions.
transit-js
Marshal values to and from the Transit data format in JavaScript.
ajv-i18n
Internationalised error messages for the Ajv JSON Schema validator.
Partial JSON Parser
A zero-dependency Python library that completes and parses incomplete JSON streamed token-by-token from LLMs.
Python JSONPath
A flexible RFC 9535 JSONPath engine for Python with JSON Pointer and JSON Patch.
json-source-map
Parses and stringifies JSON while mapping every key and value to its exact line, column, and character position.
simple-xml-to-json
A tiny, dependency-free library that transpiles XML into JSON through an AST.
json-hero-path
A lightweight TypeScript library for querying, filtering, and updating deeply nested JSON objects using compact, JSONPath-like path strings.
