A simple in-memory filesystem. Holds data in a javascript object.

Apache Arrow columnar in-memory format

Build and manage the fast-json-stringify instances for the fastify framework

JavaScript Performance Monitor

A set of efficient utilities that extend the use of JSON (streaming, estimate size, NDJSON/JSONL, etc.)

No description provided.

The progressive JavaScript framework for building modern web UI.

Query JavaScript objects with JSONPath expressions. Compiles and caches JSONpath to JS

Style components backed by Atlassian Design System design tokens powered by Compiled CSS-in-JS.

Pure JavaScript RAR archive extractor by compile the official unrar lib by Emscripten.

A micro-library of stream components for building custom JSON and JSONC processing pipelines with a minimal memory footprint — parse, filter, and transform JSON far larger than available memory with a SAX-inspired token API, on Node.js or Web Streams.

Node.js atomic and non-atomic counters, rate limiting tools, protection from DoS and brute-force attacks at scale

Mastra is a framework for building AI-powered applications and agents with a modern TypeScript stack.

Argon2id implementation in pure Javascript

ECC JS code based on JSBN

Tiny but powerful full-text search engine for browser and Node

In-memory state adapter for Chat SDK — zero-dependency subscriptions, locks, and cache for local development and tests

A WebGL memory tracker

In-memory abstract-level database for Node.js and browsers

Fixes stack traces for files with source maps