# mozilla/thimble.mozilla.org

UPDATE: This project is no longer maintained. Please check out Glitch.com instead.

Repository: https://github.com/mozilla/thimble.mozilla.org
Canonical: https://ross.abutalabs.com/products/thimblemozillaorg
Homepage: https://glitch.com
Language: JavaScript
License: MPL-2.0
License Family: copyleft
Topics: coding, javascript, html, css, learning, teaching-tool, education, code, online-editor, web-literacy
Archived: true
Last push: 2019-07-29T17:33:02+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 4893, "days_push": 2592, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1426, forks 515 (observed 2026-08-28T04:04:41.760525+00:00)

## What it is
Thimble was Mozilla's browser-based code editor for learning and teaching HTML, CSS, and JavaScript, with built-in publishing of web pages. It was officially sunset in 2018-2019 and is no longer maintained, with Mozilla recommending Glitch as a replacement.

## Use cases
- teach beginners html css and javascript in the browser
- online code editor for students
- learn web development without installing anything
- publish simple web pages from the browser
- classroom tool for teaching web literacy
- edit and preview html css js online

## When to choose
- you need a historical reference or want to fork a beginner-friendly educational web editor
- you are studying how Brackets was adapted to run in the browser

## When to avoid
- you need a maintained online editor - use Glitch or another active alternative
- you expect bug fixes, support, or security updates
- you want to deploy it in production today

## Facets
- artifact type: application
- maturity: abandoned
- function: editor, web-framework
- domain: education, web-development, developer-tools
- platform: browser
- tags: online-code-editor, web-literacy, teaching-tool, beginner-friendly, deprecated, brackets, education, web-server, nodejs

## Member repositories
- mozilla/thimble.mozilla.org (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:41.760525+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 2026-08-30T04:37:27.738077+00:00, confidence not recorded.
  - readme: https://github.com/mozilla/thimble.mozilla.org (fetched 2026-08-28T04:04:41.760525+00:00, sha b004f5a6b9c0)
  - homepage: https://glitch.com (fetched 2026-08-29T11:49:29.249739+00:00, sha 76b841a77aa1)
  - site_page: https://glitch.com/about (fetched 2026-08-29T11:49:29.258734+00:00, sha 76b841a77aa1)
- Data as of 2026-08-30T08:39:29.467469+00:00.