This is an old revision of the document!
Online tools for Web
Webmaster tools
Page analysis
- Website Speed Test & Analysis by Pingdom
- Mobile-Friendly Test by oogle
Web service checkup
Query information
Web based applets
IFTTT
CloudConvert
CloudConvert — Convert file formats
TinyPNG
TinyPNG — Compress PNG or JPG files
QR Code Tools
QRCode Monkey — Generating QR Code
QR Code Generator — QRCode Stuff
QR Code Generator — from the ZXing Project
Bulk Resize Photos
Bulk Resize Photos — Resize multiple images
Generate EAN13 code online
EAN13 code — Online API for EAN13 Code
https://bwipjs-api.metafloor.com/?bcid=ean13&text=5901234123457
Page code tools
JSFiddle
- JSFiddle Online Editor — supports HTML, JavaScript and CSS in one page.
Stack Overflow
- Stack Overflow — Where Developers Learn, Share, & Build Careers.
JavaScript Subreddit
- JavaScript Subreddit — All about the JavaScript programming language.
- [AskJS] I'm loosing my mind with a vitest importActual bug by /u/lambda_lord_legacy (2025/10/13 23:47)
- If you have an npm package, read this before November 2025 by /u/hichemtab (2025/10/13 18:12)
- VoidZero Announces Vite+ by /u/manniL (2025/10/13 17:38)
- Stop shipping useless error logs. A guide to fixing Sentry stack traces with source maps by /u/kostakos14 (2025/10/13 16:02)
- Jeasx 2.0.0 released - a JSX-powered server side framework for people who love the power of modern HTML by /u/-jeasx- (2025/10/13 09:49)
ES6 Compatibility
- ES6 compatibility table — Compatibility matrix for JavaSscript
Web design tools
Color palette generator
- Coolors.co — Generate color palettes
- ColourLOVERS — Color Trends + Palettes
- HTML Color codes — Color code picker from image
- BrandColors — Find brands' color code
Favicon
General favicon code for
<link rel="apple-touch-icon" sizes="180x180" href="favicons/apple-touch-icon.png"> <link rel="icon" type="image/png" sizes="32x32" href="favicons/favicon-32x32.png"> <link rel="icon" type="image/png" sizes="16x16" href="favicons/favicon-16x16.png"> <link rel="manifest" href="favicons/site.webmanifest"> <link rel="mask-icon" href="favicons/safari-pinned-tab.svg" color="#5bbad5"> <link rel="shortcut icon" href="favicons/favicon.ico"> <meta name="msapplication-TileColor" content="#da532c"> <meta name="msapplication-config" content="favicons/browserconfig.xml"> <meta name="theme-color" content="#ffffff">
Open Graph
Sharing button for Social
- Generate sharing button with Font Awesome