jsr-io/jsr

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

2969 stars · 172 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

JSR is the open-source package registry for modern JavaScript and TypeScript, serving as an npm-compatible alternative with native TypeScript support across multiple runtimes (Deno, Node.js, Bun, browsers). The repository contains the full source code for the registry service, including a Rust management API, a Fresh-based frontend running on Cloudflare Workers, and storage on Cloudflare R2 with PostgreSQL.

Use cases

• publish a TypeScript package without build steps
• find an npm-compatible registry for ES modules
• host packages usable across Deno, Node, and Bun
• search for JavaScript and TypeScript packages
• self-host or contribute to a modern JS package registry
• auto-generate documentation from package source

When to choose

• you publish TypeScript and want zero-configuration .d.ts distribution
• you need ESM-first packages that work across multiple JS runtimes
• you want npm backwards compatibility with a modern registry
• you want to contribute to or study the registry's infrastructure

When to avoid

• you only need to consume existing npm packages with no TypeScript or ESM needs
• you require a fully self-hosted private registry out of the box (the code is tied to Cloudflare/GCP infrastructure)
• your toolchain depends on CommonJS-only workflows

Facets

service · maturity active

package-manager api-framework http-server search-engine documentation developer-tools web-development apis cloud rust package-registry npm-compatibility typescript-native esm deno cloudflare-workers self-hostable-registry javascript typescript web-server docker

Member repositories

For agents

markdown · JSON · MCP: product_card(name="jsr-io/jsr")