LazySizes

2,050 websites

1,971 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

2,050 websites

Websites using LazySizes

LazySizes

Last 30 days uptimeⓘ

99.822%

LazySizes friendly technologies

Google Analytics

WordPress

jQuery

Google Font API

HSTS

Cart Functionality

Priority Hints

Bootstrap

Webpack

Cloudflare

Facebook Pixel

Open Graph

Yoast SEO

core-js

Google Tag Manager

Module Federation

MySQL

PHP

Who Uses LazySizes?

1,971 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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Quicklink is a JavaScript library that automatically prefetches links in the viewport, speeding up subsequent page loads.

Instant.Page

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

InstantClick

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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.