Packages
Featured
- @kysely/kyselyA type-safe TypeScript SQL query builder
- @es-toolkit/es-toolkitA modern JavaScript utility library that's 2-3 times faster and up to 97% smaller—a major upgrade to lodash.
- @zod/zodTypeScript-first schema declaration and validation library with static type inference
- @punkpeye/fastmcpA TypeScript framework for building MCP (Model Context Protocol) servers.
- @rabbit-company/webHigh-performance web framework
- @campfire/coreLightweight library that works with vanilla DOM elements and provides fine-grained reactivity + utils for building websites.
- @am/neuralnetworkA simple neural network library for JavaScript and TypeScript.
- @sigmasd/jsr-mcpA Model Context Protocol (MCP) server that provides access to JSR (JavaScript Registry) module documentation.
- @iuioiua/redisFast, lightweight Redis client built upon the Web Streams API.
- @img/pngA image encoder/decoder for the PNG format
Recently updated
- @lukax/llms-ink0.3.0
- @yusufaf/sfn-diagramGenerate SVG & Mermaid diagrams from AWS Step Functions ASL definitions, with PNG export2.0.1
- @optique/manMan page generator for Optique CLI parsers1.0.16-dev.2983+e3903a48
- @optique/logtapeLogTape logging integration for Optique CLI parser1.0.16-dev.2983+e3903a48
- @optique/zodZod value parsers for Optique1.0.16-dev.2983+e3903a48
- @optique/runProcess-integrated CLI parser for Node.js, Bun, and Deno1.0.16-dev.2983+e3903a48
- @optique/temporalTemporal value parsers for Optique1.0.16-dev.2983+e3903a48
- @optique/envEnvironment variable support for Optique1.0.16-dev.2983+e3903a48
- @optique/valibotValibot value parsers for Optique1.0.16-dev.2983+e3903a48
- @optique/configConfiguration file support for Optique with Standard Schema validation1.0.16-dev.2983+e3903a48
New to JSR
- @lukax/llms-ink
- @codexa/openapiOpenAPI document generation from Codexa HTTP route metadata.
- @codexa/busLocal event bus and optional Redis Pub/Sub for Codexa applications.
- @ipsadt/tg-widgets
- @logging/wide-events
- @sandwich/cahmls
- @organisationsnummer/organisationsnummer
- @jm3s4/agentrc
- @nqucsie111310512/message-board
- @carmenaresearch/json-schema-for-llms
Why JSR?
Made for TypeScript & ESM
JSR is designed for TypeScript. You publish TypeScript source, and JSR handles generating API docs, .d.ts files, and transpiling your code for cross-runtime compatibility.
JSR packages are distributed as web-standard ECMAScript modules.
Builds on npm
JSR isn't a replacement for the npm registry; it's a superset of npm.
JSR modules can be used with any JavaScript package manager, and in any project with a node_modules folder.
Works with any runtime
JSR modules can be used in Node.js, Deno, Bun, Cloudflare Workers, and more.
Module authors can count on great editor support from strongly typed modules, without the need to transpile and distribute typings manually.