Web Iconography Architecture: PWA Manifests & Multi-Platform Favicon Specs
Historically introduced by Microsoft Internet Explorer 5 in 1999 as a single 16×16 ICO file, favicons have evolved into a multi-platform identity system. High-DPI screens, Apple iOS home screen bookmarks, and Progressive Web App (PWA) splash screens require tailored raster assets to prevent pixelation.
1. Essential Web Icon Specification Matrix
- favicon-16x16.png & favicon-32x32.png: Standard desktop browser tabs and bookmark bars.
- apple-touch-icon.png (180×180): High-resolution icon rendered when users tap "Add to Home Screen" on iOS Safari.
- android-chrome-192x192.png & 512x512.png: PWA application icons, task switcher tiles, and splash launch screens on Android.
- site.webmanifest: JSON descriptor providing metadata for web app installation.
Frequently Asked Questions (FAQ)
What favicon sizes are required for modern web browsers and mobile devices?
Modern best practice requires: favicon-16x16.png (browser tabs), favicon-32x32.png (Retina tabs), apple-touch-icon.png (180x180 for iOS home screens), and android-chrome-192x192.png / 512x512.png (PWA install splash screens and Android homescreens).
Are my uploaded logo files sent to any remote server?
Never. All image scaling, canvas rendering, and ZIP archiving take place 100% inside your browser memory using HTML5 Canvas and JSZip.
How do I install the generated favicons on my website?
Download the ZIP package, extract all image files and 'site.webmanifest' into your website's public root folder (/), and paste the generated HTML link tags into your <head> section.