CSS Lint. HTML Purifier - Filter your HTML the standards-compliant way! w3c/tidy-html5 - GitHub. REDbot: Awesome HTTP Testing. I am always on the lookout for new and cool web performance and quality tools. One of my favorite tools is REDbot. Every web performance advocate should be using REDbot regularly. Want to know why? To start, REDbot was created by the awesome Australian Mark Nottingham.
Mark writes some excellent technical-yet-easy-to-understand essays on the inner workings of HTTP, such as the definitive Caching tutorial for Web authors and web masters. As an example, here are just some the things that REDbot checks for with the Last-Modified header. Is the date format valid? That is just scratching the surface of what REDbot can find out about your site. Of course, detecting some HTTP problems can get pretty involved.
Reason #3: REDbot is open source and hosted on GitHub which makes it super easy to start using. Reason #4: It’s web UI is gorgeous. REDbot is an awesome tool which provides much needed HTTP insight and validation available nowhere else. Samarudge/Squeezeit - GitHub. Jorgebastida/glue - GitHub. Minimus: The OS X JavaScript and CSS Minifier. Minimus is a GUI frontend for Yahoo’s YUI Compressor. Instead of using inconvenient and slow websites to compress your JavaScript and CSS, you can do it right on your Mac. Add files to the queue by dropping them on the Dock icon (or by using the File menu) and press the Minify button to start the process. In no time at all, copies with a .min.js or .min.css extension will appear alongside the originals. Minimus is a free download, but donations are appreciated if you find the app useful.
Requires Mac OS X 10.6 Snow Leopard.