• Website Speed Test & Analysis by Pingdom

• Mobile-Friendly Test by oogle

• SSL Server Test by Qualys SSL Labs

• Analyse HTTP response headers by ReportURI

• SPF Online Check by MXToolbox

• MX Lookup Tool by MX Toolbox®

• DNS test and reports by intoDNS

• DNS & Privacy Test by Tenta

• DNS Speed Test by UltraTools

• 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

IFTTT — Automation Web applets to enable seamless integration between web services.

• Settings | Activities

• Settings | Activities

My Applets

CloudConvert — Convert file formats

TinyPNG — Compress PNG or JPG files

QRCode Monkey — Generating QR Code

QR Code Generator — QRCode Stuff

QR Code Generator — from the ZXing Project

Bulk Resize Photos — Resize multiple images

EAN13 code — Online API for EAN13 Code

  https://bwipjs-api.metafloor.com/?bcid=ean13&text=5901234123457

URL Encode-Decode — %EC%9C%A0%EC%95%8C%EC%97%98

Symbols & Fancy Text — 𝓐 𝓑 𝓒 𝓓 𝓔 𝔸 𝔹

• JSFiddle Online Editor — supports HTML, JavaScript and CSS in one page.

• Stack Overflow — Where Developers Learn, Share, & Build Careers.

• JavaScript Subreddit — All about the JavaScript programming language.

  • thecreazy/cerbero: track your user on your web page by /u/thecreazy (2021/01/27 17:11)
  • WTF Wednesday (January 27, 2021) by /u/AutoModerator (2021/01/27 17:00)
  • How to insertAt, removeAt and remove an element in array JavaScript (2021/01/27 16:56)
  • Monitor chess progress using Twilio Serverless and SMS by /u/lizziepika (2021/01/27 09:52)
  • Learn Dependency Injection with Doug the Goldfish by /u/CodalReef (2021/01/27 08:30)

• ES6 compatibility table — Compatibility matrix for JavaScript

• Don's Tools – HTML, CSS, JavaScript and PHP
• JS BEAUTIFIER – JavaScript files
• NGINX BEAUTIFIER – Nginx Configuration file

• Coolors.co — Generate color palettes
• ColourLOVERS — Color Trends + Palettes

• HTML Color codes — Color code picker from image

• BrandColors — Find brands' color code

• Official brand color code

• favicon generator

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">

• favicon checker

• Open Graph generator

• Generate sharing button with Font Awesome

• Font Meme – Signature maker and so on

• HTML5 UP