Developer Tools

Developer tools for Socket.io

Inject charts in your private leaderboard page for Advent of Code – see https://github.com/jeroenheijmans/advent-of-code-charts

Extract colours from any website

CrossBrowserTesting Local Connection lets you test behind your firewall in 1500+ real desktop and mobile browsers.

Dynu dynamic DNS client for Chrome

A web browser extension for checking accessibility issues

A devtool for Marionette

HackBar for Chrome

Send pages and links to another browser using Choosy (macOS only).

Monitor how much data being consumed by website and how long took to load

Sitemod lets anybody modify a website without having access to the source code and get a shareable link to the modified website.

An extension that supports Advanced REST Client session management reading Chrome cookies.