KevinJCandlert

This is the easiest way to add custom css and/or javascript to your site. Two large windows with css and javascript syntax highlighting makes it super easy to read and write code. 
JK Development console also uses AJAX to save the css and javascript data – meaning that the page won’t reload and you can keep on working without have to look for that last spot you edited.
Hope you like it! 🙂
Syntax highlightning by ACE (http://ace.c9.io/).

JK Development Console

A development console for adding custom javascript and CSS.

Drew Jaynes

koopersmith

Adds a PHP/SQL console to the debug bar. Requires the <a href="https://wordpress.org/extend/plugins/debug-bar/" rel="ugc">Debug Bar plugin</a> (v0.5 or later).

Debug Bar Console

Very easy to use and useful for debugging

(CA)
L'ús és molt senzill i és molt util per desenvolupar plugins

Very easy to use and useful for debugging


Update 2024-10-28: I've adopted this plugin and taken over development.



I use this add-on for the Debug Bar plugin on personal, client, and customer sites all the time and it never fails to help me solve problems more efficiently. It's a shame that it no longer shows up in plugin search results because the tested-up-to version is out of date, but that doesn't stop me from manually installing it. Consistently reliable and gets the job done. This plugin is vital to my WordPress debugging toolbox.


Great utility, works every time!

Adds a PHP/SQL console to the Debug Bar. Requires the Debug Bar plugin.

JK Development Console vs Debug Bar Console