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hubspot/odometer

★ 7,304CSSAudience · developerComplexity · 1/5Setup · easy

TLDR

JavaScript and CSS library by HubSpot that makes numbers on a web page animate smoothly like a rolling odometer instead of jumping instantly to a new value, ideal for live counters, dashboards, and scoreboards.

Mindmap

mindmap
  root((Odometer))
    What it does
      Animate numbers
      Rolling digit effect
      Smooth transitions
    Tech Stack
      JavaScript
      CSS transitions
    Use Cases
      Live counters
      Dashboards
      Scoreboards
    Audience
      Frontend developers
      UI designers
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Code map

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Things people build with this

USE CASE 1

Make a live visitor counter or dashboard metric animate smoothly each time its value updates.

USE CASE 2

Add a rolling digit effect to a fundraising total or follower count on a marketing landing page.

USE CASE 3

Display score changes in a game or leaderboard with a physical odometer visual that ticks up or down.

Tech stack

JavaScriptCSS

Getting it running

Difficulty · easy Time to first run · 5min

In plain English

Odometer is a JavaScript and CSS library that animates numbers changing on a web page, making them tick upward or downward like the rolling digits on a physical odometer or a scoreboard. Instead of a number simply jumping from one value to another, Odometer makes the transition smooth and visible, which can make dashboards and live counters feel more polished and alive. The library was created and open-sourced by HubSpot, the marketing and sales software company. It handles the visual animation entirely through CSS transitions, with JavaScript handling the timing and state. The combination keeps the animation performance smooth in modern browsers. The README for this repository is minimal and links out to the project's documentation and demo site rather than including details directly. Based on the description and the code itself, Odometer is a front-end display component: you point it at a number on your page, and it takes care of the animated transition whenever that number changes. It is not a data fetching or business logic library, just a visual effect for numeric displays. The project is released as open source under HubSpot's open-source program.

Copy-paste prompts

Prompt 1
Show me how to add Odometer to a webpage so a user-count element animates from 1000 to 1500 when the page loads.
Prompt 2
I have a live dashboard where numbers update every few seconds via a polling API. Show me how to hook Odometer up so each new value triggers a smooth rolling animation.
Prompt 3
How do I customize Odometer's visual theme, font, colors, digit size, to match my site's design?
Prompt 4
Using Odometer, create an animated countdown timer that ticks down from 60 to 0, one second at a time, with a smooth rolling transition.
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