LazySizes

2,053 websites

1,974 uptime cards

What is LazySizes?

LazySizes belongs to JavaScript libraries and Performance categories.

LazySizes is a lightweight, feature-rich JavaScript library used for lazy loading images, iframes, scripts, and other resources. It intelligently loads content only when it's about to enter the viewport, significantly improving page load times and reducing bandwidth usage. LazySizes is highly configurable and works...

LazySizes Performance Insights

2,053 websites

Websites using LazySizes

LazySizes

Last 30 days uptimeⓘ

99.908%

LazySizes friendly technologies

jQuery

WordPress

Google Analytics

core-js

Yoast SEO

MySQL

Google Tag Manager

PHP

Module Federation

Cart Functionality

Priority Hints

Google Font API

Bootstrap

Open Graph

Cloudflare

Webpack

HSTS

Facebook Pixel

Who Uses LazySizes?

1,974 uptime cards

Top LazySizes Alternatives

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Lozad.js is a lightweight JavaScript library for efficient lazy loading of images and other media, improving page load times.

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Instant.Page is a lightweight JavaScript library that uses just-in-time preloading to make website navigation faster.

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InstantClick is a JavaScript library that preloads pages on hover, making website navigation feel instantaneous.

Intersection Observer

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Intersection Observer is a browser API that efficiently detects when an element enters or leaves the viewport, useful for implementing lazy loading and infinite scrolling.