# inorganik/countUp.js

Animates a numerical value by counting to it

Repository: https://github.com/inorganik/countUp.js
Canonical: https://ross.abutalabs.com/products/countupjs
Homepage: https://inorganik.github.io/countUp.js
Language: TypeScript
License: MIT
License Family: permissive
Last push: 2026-07-02T13:12:43+00:00

## Health v2 (maintenance only)
Score: 88/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 90, release rhythm 79, longevity 100
- inputs: {"age_days": 4629, "days_push": 62, "days_rel": 62, "gap_med": 78.0, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 8159, forks 1354 (observed 2026-08-28T04:10:13.933967+00:00)

## What it is
CountUp.js is a dependency-free, lightweight JavaScript/TypeScript class that animates a numerical value by counting up or down to it in the browser. It offers extensive options for formatting, easing, custom numerals, and auto-animation when elements become visible.

## Use cases
- animate a counter on a landing page when it scrolls into view
- count up statistics numbers on a dashboard
- animate odometer-style number rollouts
- display animated numeric values in React, Vue, Angular, or Svelte apps
- count down from one number to another with easing
- format animated numbers with grouping separators and custom numerals

## When to choose
- you need a tiny, dependency-free number animation for any browser
- you want framework integrations for Angular, React, Vue, or Svelte
- you need customizable formatting like decimal places, separators, prefixes, and alternate numeral systems

## When to avoid
- you need general-purpose animation of non-numeric UI elements
- you need canvas or WebGL-based animation
- you need server-side rendering of animated values

## Facets
- artifact type: library
- maturity: stable
- function: animation, ui-components, data-visualization
- domain: web-development, frontend
- platform: browser, cross-platform
- tags: countup, number-animation, typescript, dependency-free, odometer, nodejs

## Member repositories
- inorganik/countUp.js (main) score 88

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:13.933967+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 2026-08-29T17:29:45.497972+00:00, confidence not recorded.
  - readme: https://github.com/inorganik/countUp.js (fetched 2026-08-28T04:10:13.933967+00:00, sha ceab42d2c83e)
  - homepage: https://inorganik.github.io/countUp.js (fetched 2026-08-29T08:28:46.409161+00:00, sha 32a37f3e8193)
  - registry_npm: https://registry.npmjs.org/countup.js (fetched 2026-08-29T08:28:46.419190+00:00, sha 49cc1e36d0e2)
- Data as of 2026-08-30T08:39:29.467469+00:00.