There are a number of ways to preload an image on demand with JavaScript — each with their own strengths & drawbacks. Let's explore them.
TinyPNG – Compress AVIF, WebP, PNG and JPEG images
Free online image optimizer for faster websites! Reduce the file size of your AVIF, WEBP, JPEG and PNG images while preserving the image quality.
Javascript for Artists | brad.quest
A collection of libraries & resources for visual media on the web.
HTML Can Do That
HTML has been gobbling up swathes of what used to be JavaScript’s remit. This page lists a bunch of dynamic functionality that we can now achieve with just HTML.
Mediabunny — A complete JavaScript media toolkit for the browser | Mediabunny
A JavaScript library for reading, writing, and converting media files. Directly in the browser, and faster than anybunny else.
Anime.js | JavaScript Animation Engine
A fast, multipurpose and lightweight JavaScript animation library
Animated gif tools
Easy to use online animated GIF maker and image editor. Create, convert, crop, resize, reverse, optimize animated GIF, WebP, APNG files, images and videos.
Squoosh
Squoosh is the ultimate image optimizer that allows you to compress and compare images with different codecs in your browser.
Handsum: An LQIP Image File Format
Low Quality Image Placeholders (LQIPs) are very small (both in terms of file size and pixel dimensions) images that load very quickly, providing immediate visual feedback while full-resolution images load slowly in the background. They are small-in-file-size enough that it’s feasible to base64-encode and inline them into a web page, minimizing network round-trips and improving page load times.
Practical guide to the <img> element: from the basics to LCP | Joan León
The <img> element has attributes that make a real difference in performance: loading, decoding, fetchpriority, srcset and sizes. A practical guide to using them well.
Preserving the Pixel Art Look in Web Content
Learn essential CSS techniques, scaling strategies, and design principles that preserve the crisp, totally-cool aesthetic of pixel graphics across high-resolution displays and responsive web environments.
How Baseline Can Help You Ship Less JavaScript — Smashing Magazine
The gap between “you need a library for this” and “the browser does this” keeps closing. A practical guide to auditing your dependencies and finding what the web platform can now handle for you.
Immich
Self-hosted photo and video management solution. Easily back up, organize, and manage your photos on your own server. Immich helps you browse, search and organize your photos and videos with ease, without sacrificing your privacy.
Free Background Remover - Offline AI Tool (WebGPU)
Remove image backgrounds instantly and securely in your browser. 100% Offline, 100% Free, Privacy-First, Unlimited HD Downloads. Supports JPG, PNG, WebP.