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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json-schema
A lightweight, historical CommonJS implementation of the original JSON Schema draft specifications
ExcelJS
Read, manipulate, and write XLSX spreadsheet data, styles, and formulas in JavaScript
jsoniter
A high-performance, 100% compatible drop-in replacement for Go's encoding/json.
openapi-ts
OpenAPI-to-TypeScript code generator producing production-grade SDKs, Zod schemas, and TanStack Query hooks.
JSON-Patch
Lean, high-performance RFC 6902 JSON Patch and JSON Pointer implementation for applying, generating, validating, and observing diffs between JSON documents.
@apidevtools/swagger-parser
Parses, validates, and dereferences Swagger 2.0 and OpenAPI 3.x specs in Node.js and browsers
JSONPath
A JavaScript library for querying, transforming, and extracting data from JSON documents using an extended JSONPath syntax.
@rjsf/core
The React engine that turns a JSON Schema into a fully working form
sjson
A fast, dependency-light Go library for setting and deleting values in JSON documents by dot-path, without full unmarshaling.
conf
Simple, schema-validated config file persistence for Node.js apps and CLI tools
serde_with
Custom de/serialization helpers for Rust's serde, via the with and serde_as annotations
feedparser
Parses RSS, Atom, RDF, CDF, and JSON feeds into one normalized Python dictionary.
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.
json-2-csv
Converts arrays of JSON documents to RFC 4180 compliant CSV and back, with native support for nested sub-documents.
config
Layered configuration system for Rust applications with strong 12-factor support
flat
Flattens nested JavaScript objects into dot-delimited keys and unflattens them back, with a bundled CLI.
rss-parser
Lightweight RSS and Atom feed parser for Node.js and the browser that turns XML feeds into plain JavaScript objects
json2csv
Convert JSON arrays into CSV strings and files with configurable fields, formatters, and streaming parsers for Node.js.
csv-parser
A zero-dependency streaming CSV parser for Node.js that converts CSV into JSON at high speed.
json-logic-js
A lightweight JavaScript engine for building, storing, and executing JsonLogic rules across the front-end, back-end, and database.
jsonschema
A compliant, dependency-light Go library for compiling and validating JSON Schema across five draft versions, with rich hierarchical errors.
jmespath.js
Query and transform JSON data in JavaScript with a single declarative expression string
