# preactjs/wmr

👩‍🚀 The tiny all-in-one development tool for modern web apps.

Repository: https://github.com/preactjs/wmr
Canonical: https://ross.abutalabs.com/products/wmr
Homepage: https://wmr.dev/
Language: JavaScript
License: MIT
License Family: permissive
Topics: build-tool, esmodules, preact, rollup
Last push: 2024-03-19T07:13:38+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2295, "days_push": 897, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4917, forks 105 (observed 2026-08-28T04:09:02.358479+00:00)

## What it is
WMR is a tiny all-in-one development tool for modern web apps, packaged as a single 2MB dependency-free file. It provides a zero-config dev server with hot reloading, npm package handling without installation, and Rollup-based production builds with static prerendering.

## Use cases
- serve a directory of HTML files with ES modules without configuration
- develop a Preact app with hot module reloading
- build and prerender a web app to static HTML for production
- import npm packages during development without installing them
- use TypeScript and CSS Modules with no setup
- scaffold a new modern web app project quickly

## When to choose
- you want a zero-config dev server and bundler for a small Preact or ES module app
- you need fast startup and HMR without heavy tooling
- you want Rollup plugin compatibility in a lightweight tool

## When to avoid
- starting any new project - the project is officially unmaintained and recommends Vite with @preactjs/preset-vite instead
- you need long-term support, security updates, or modern ecosystem compatibility
- you need a robust production build pipeline

## Facets
- artifact type: cli-tool
- maturity: abandoned
- function: build-tool, http-server, ssr, static-site-generator, developer-tools
- domain: web-development, frontend, developer-tools
- platform: cli, cross-platform
- tags: preact, rollup, esmodules, hot-module-replacement, no-longer-maintained, zero-config, bundler, command-line, nodejs

## Member repositories
- preactjs/wmr (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:02.358479+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:18:03.090471+00:00, confidence not recorded.
  - readme: https://github.com/preactjs/wmr (fetched 2026-08-28T04:09:02.358479+00:00, sha 3b2f426e751e)
  - homepage: https://wmr.dev/ (fetched 2026-08-29T09:00:24.403836+00:00, sha 2bf52f371491)
  - site_page: https://wmr.dev/docs (fetched 2026-08-29T09:00:24.413356+00:00, sha 61b181f97851)
  - registry_npm: https://registry.npmjs.org/wmr (fetched 2026-08-29T09:00:24.416146+00:00, sha 74a5be3a16db)
- Data as of 2026-08-30T08:39:29.467469+00:00.