# RaspberryPiFoundation/blockly

The web-based visual programming editor.

Repository: https://github.com/RaspberryPiFoundation/blockly
Canonical: https://ross.abutalabs.com/products/blockly
Homepage: https://blockly.com
Language: JavaScript
License: Apache-2.0
License Family: permissive
Last push: 2026-08-26T21:32:50+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 96, longevity 100
- inputs: {"age_days": 4695, "days_push": 7, "days_rel": 29, "gap_med": 29.0, "n_releases_24m": 17}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 13533, forks 3872 (observed 2026-08-28T04:11:03.468861+00:00)

## What it is
Blockly is a JavaScript library that adds a customizable, drag-and-drop visual programming editor to web apps, representing code concepts as interlocking graphical blocks. It is fully client-side, generates code in a target language of your choice, and powers large coding-education platforms like Scratch and Code.org.

## Use cases
- add a block-based visual code editor to a web app
- build a coding education platform for kids
- let users create scripts without writing syntax
- generate code from drag-and-drop blocks
- create custom blocks for a domain-specific visual language
- build a Scratch-like programming environment

## When to choose
- you need a mature, well-documented visual block editor embedded in a browser-based application
- you want users to program without dealing with syntax
- you need code generation in multiple target languages from a visual interface
- you are building an educational coding product

## When to avoid
- you need a text-based code editor rather than a visual block editor
- you need server-side or native desktop editing without a browser environment
- you want an end-user app rather than a library to build your own editor
- your project requires minimal JavaScript payload and cannot afford a large client-side library

## Facets
- artifact type: library
- maturity: stable
- function: editor, ui-components, frontend-framework, programming-language
- domain: web-development, frontend, education, programming-languages, developer-tools
- platform: browser, cross-platform
- tags: visual-programming, block-based-coding, drag-and-drop, code-generation, cs-education, scratch, education, web-server, nodejs

## Member repositories
- RaspberryPiFoundation/blockly (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:03.468861+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 2026-08-29T17:13:14.377386+00:00, confidence not recorded.
  - readme: https://github.com/RaspberryPiFoundation/blockly (fetched 2026-08-28T04:11:03.468861+00:00, sha 1fcd84026b51)
  - homepage: https://blockly.com (fetched 2026-08-29T08:08:23.415784+00:00, sha 3220f225d672)
  - site_page: https://docs.blockly.com/guides/get-started/what-is-blockly (fetched 2026-08-29T08:08:23.418536+00:00, sha 24ff827e19ef)
  - site_page: https://docs.blockly.com/codelabs/getting-started/codelab-overview (fetched 2026-08-29T08:08:23.420174+00:00, sha 272005d9556f)
- Data as of 2026-08-30T08:39:29.467469+00:00.