# formio/formio.js

JavaScript powered Forms with JSON Form Builder

Repository: https://github.com/formio/formio.js
Canonical: https://ross.abutalabs.com/products/formiojs
Homepage: https://formio.github.io/formio.js
Language: JavaScript
License: MIT
License Family: permissive
Topics: form-schema, vanilla-js, vanillajs, angular, react, vue, forms
Last push: 2026-08-12T18:23:45+00:00

## Health v2 (maintenance only)
Score: 76/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 35, longevity 100
- inputs: {"age_days": 3997, "days_push": 21, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2087, forks 1112 (observed 2026-08-28T04:06:12.079817+00:00)

## What it is
A plain JavaScript library that renders JSON schema-based web forms and includes a full drag-and-drop JSON form builder. It also serves as an SDK for communicating with the Form.io APIs.

## Use cases
- render JSON schema forms in a web app
- embed a drag-and-drop form builder in my application
- build dynamic multi-step forms without a framework
- connect forms to a Form.io backend API
- create forms with nested components, date pickers, and input masks
- use the same form schema across React, Angular, and Vue apps

## When to choose
- you need schema-driven forms rendered in vanilla JavaScript without framework dependencies
- you use the Form.io platform and need a client SDK
- you want an embeddable form builder that outputs portable JSON form definitions

## When to avoid
- you need a fully self-hosted form backend with no Form.io service dependency
- you want a lightweight single-input form where a schema engine is overkill
- you need deep native integration with one framework's state management

## Facets
- artifact type: library
- maturity: active
- function: form-handling, ui-components, sdk, http-client
- domain: web-development, frontend, apis
- platform: browser, cross-platform
- tags: form-builder, -forms, vanilla-js, form-renderer, formio, nodejs

## Member repositories
- formio/formio.js (main) score 76

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:12.079817+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 2026-08-30T02:55:44.999544+00:00, confidence not recorded.
  - readme: https://github.com/formio/formio.js (fetched 2026-08-28T04:06:12.079817+00:00, sha e1ec0dec2cc7)
  - homepage: https://formio.github.io/formio.js (fetched 2026-08-29T10:35:54.733767+00:00, sha 0310b5a55453)
- Data as of 2026-08-30T08:39:29.467469+00:00.