This article lists the top 10 JavaScript countdown libraries for modern web development projects. We selected these libraries based on page views on our website over the past year, GitHub stars, and community adoption.
A JavaScript countdown displays a clock that decrements from a specific date or time to zero. You can use these components for “coming soon” pages, product launches, event promotions, and limited-time offers.
Browse the collection below to find the correct library for your specific UI requirements.
Originally Published Jan 2019, updated Dec 10, 2025
1. Classic Flip Clock Style Countdown & Counter Library – flip.js
flip.js is an open-source, fully customizable, pretty nice, classic flip clock style countdown & counter component in vanilla JavaScript and CSS.
Ideal for stopwatch, clock, visitor counter, event countdown, billboard & airport-style text flip animation and much more.
Features:
- 24 different easing modes.
- 34 transform functions to build complex counters easily.
- Configurable flip animation.
- Multiple languages.
- Fully responsive and mobile-friendly.
- Auto syncs the client and server time.
- Quickly implements it in your project with the 12 presets.
Best For:
- Airport-style text displays.
- Event countdowns requiring high visual impact.