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Online tools for Web
Webmaster tools
Page analysis
- Website Speed Test & Analysis by Pingdom
- Mobile-Friendly Test by oogle
Web service checkup
Query information
- NSLOOKUP by
KLOTH.NET
- Look up WHOIS by
Whois.com
- WHOIS IP Lookup by NEUSTAR /
Ultratools
- MAC Address lookup by
MA:CV:en:do:rs
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] Visible Confusion in Js Object! by /u/Guilty_Difference_42 (2025/06/23 18:50)
- Introducing ovr - a lightweight server framework for streaming HTML using asynchronous generator JSX. by /u/rossrobino (2025/06/23 18:38)
- Type-Safe Error Handling in GraphQL by /u/stretch089 (2025/06/23 18:01)
- I made a Chrome/Firefox extension that removes duplicate images and GIFs on Reddit profiles by /u/DeimosFobos (2025/06/23 16:30)
- How we cut CKEditor's bundle size by 40% by /u/filipsobol (2025/06/23 15:22)
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
Text generator with fonts
- Font Meme – Signature maker and so on