# mpetroff/pannellum

Pannellum is a lightweight, free, and open source panorama viewer for the web.

Repository: https://github.com/mpetroff/pannellum
Canonical: https://ross.abutalabs.com/products/pannellum
Homepage: https://pannellum.org/
Language: JavaScript
License: MIT
License Family: permissive
Topics: webgl, javascript, panorama, library
Last push: 2026-07-12T20:45:23+00:00

## Health v2 (maintenance only)
Score: 75/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 92, release rhythm 39, longevity 100
- inputs: {"age_days": 5098, "days_push": 52, "days_rel": 196, "gap_med": null, "n_releases_24m": 1}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4881, forks 775 (observed 2026-08-28T04:09:01.797931+00:00)

## What it is
Pannellum is a lightweight, free, open source panorama viewer for the web built with HTML5, CSS3, JavaScript, and WebGL. It ships as a single 21kB gzipped file that can be embedded via iframe or a JavaScript API, supporting equirectangular, cube map, partial, and multi-resolution panoramas.

## Use cases
- display 360 degree equirectangular panoramas on a website
- embed a virtual tour with hotspots into a page
- show real estate property panoramas without plugins
- build a lightweight photo sphere viewer
- create multi-resolution panoramic image tours
- add a panorama viewer to a web app via JavaScript API

## When to choose
- you need a plug-in free, framework-free panorama viewer
- bundle size matters and you want a single small file
- you need hotspots, tours, compass headings, or video panorama support
- you want easy iframe embedding or a CDN-hosted viewer

## When to avoid
- you need a full 3D engine or game-like scene authoring
- you require server-side rendering of panoramas
- you need support for very old browsers without WebGL or CSS 3D transforms

## Facets
- artifact type: library
- maturity: stable
- function: graphics, image-processing, ui-components
- domain: web-development, frontend, graphics, photography
- platform: browser
- tags: panorama-viewer, webgl, equirectangular, 360-photos, virtual-tours, hotspots, web-server, javascript

## Member repositories
- mpetroff/pannellum (main) score 75

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:01.797931+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 2026-08-29T18:18:16.422565+00:00, confidence not recorded.
  - readme: https://github.com/mpetroff/pannellum (fetched 2026-08-28T04:09:01.797931+00:00, sha af16fb175431)
  - homepage: https://pannellum.org/ (fetched 2026-08-29T09:01:00.386883+00:00, sha 39c1a090115c)
  - site_page: https://pannellum.org/features (fetched 2026-08-29T09:01:00.396079+00:00, sha be3f5e3fa3ec)
  - site_page: https://pannellum.org/documentation/overview (fetched 2026-08-29T09:01:00.398243+00:00, sha e258a30fb562)
  - registry_npm: https://registry.npmjs.org/pannellum (fetched 2026-08-29T09:01:00.400268+00:00, sha 43425b139b93)
- Data as of 2026-08-30T08:39:29.467469+00:00.