# WICG/webpackage

Web packaging format

Repository: https://github.com/WICG/webpackage
Canonical: https://ross.abutalabs.com/products/webpackage
Language: Go
License: NOASSERTION
License Family: other
Last push: 2026-06-25T06:33:41+00:00

## Health v2 (maintenance only)
Score: 72/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 89, release rhythm 35, longevity 100
- inputs: {"age_days": 3605, "days_push": 69, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1257, forks 124 (observed 2026-08-28T04:04:09.445024+00:00)

## What it is
A collection of IETF/WICG specifications and Go tooling for packaging websites into portable bundles, including Signed HTTP Exchanges (SXG), Web Bundles, and Isolated Web Apps signing. It lets resources that make up a site be bundled for offline sharing, with or without cryptographic proof of origin.

## Use cases
- bundle a website into a single file for offline sharing
- create signed HTTP exchanges (SXG) for a site
- sign web bundles with an integrity block for isolated web apps
- generate and manipulate web bundle files from a CLI
- verify that bundled resources came from the original origin
- package subresources like JS modules, stylesheets, images, and fonts

## When to choose
- you need to implement or test the web packaging / SXG / web bundle specifications
- you want to produce signed exchanges or signed web bundles for distribution
- you're building tooling that reads or writes the web bundle format

## When to avoid
- you're looking for the webpack JavaScript bundler, which is a different project
- you just need standard static site generation or JS bundling for deployment
- you need a production-ready end-user application rather than spec tooling

## Facets
- artifact type: library
- maturity: active
- function: serialization, security, cryptography, developer-tools
- domain: web-development, apis, security, developer-tools
- platform: cross-platform, go, cli
- tags: web-packaging, web-bundles, signed-http-exchanges, sxg, isolated-web-apps, specifications, offline-sharing

## Member repositories
- WICG/webpackage (main) score 72

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:09.445024+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 2026-08-30T05:07:10.558570+00:00, confidence not recorded.
  - readme: https://github.com/WICG/webpackage (fetched 2026-08-28T04:04:09.445024+00:00, sha 76228f6aa4fd)
- Data as of 2026-08-30T08:39:29.467469+00:00.