Quality Tools

Handle MySQL increment counter bursts with the Slotted Counter Pattern

Optimizing the size of images can have a bigger impact on performance than all other areas combined. In this article, Louis Lazaris covers different tools available for reducing the size of images.

Everything an SEO expert needs to know to use images for ranking. With the right implementation, pictures can be both a decoration and a ranking benefit.

Run a free website speed test from around the globe using real browsers at consumer connection speeds with detailed optimization recommendations.

Build, test and demo your JavaScript application without an API

Images have also been a key part of the web. They communicate ideas instantly, but they are also a lot heavier than text to load. This means that it’s essential to get loading and displaying them right, if you want to give your users a fantastic first impression. An excerpt from [Addy's new book](https://www.smashingmagazine.com/2021/04/image-optimization-pre-release/) (also, check a [free PDF preview](http://provide.smashingmagazine.com/eBooks/image-optimization-sample-chapter.pdf)).

Stylesheet analysis tool. Contribute to katiefenn/parker development by creating an account on GitHub.

Analyze your CSS and keep track of changes in complexity and branding. Share your statistics with everyone in your team and get conversations going.

Yellow Lab Tools is a free online web performance analyzer. It audits a webpage for performance and front-end quality issues. And it's open-source!

Easily test your htaccess rewrite rules

Real-time code collaboration inside any IDE

WSTG - Stable on the main website for The OWASP Foundation. OWASP is a nonprofit foundation that works to improve the security of software.

Introducing Pest: An elegant PHP Testing Framework with a focus on simplicity

Catch bugs and vulnerabilities in your app, with thousands of automated Static Code Analysis rules.

GTmetrix is a free tool that analyzes your page's speed performance. Using PageSpeed and YSlow, GTmetrix generates scores for your pages and offers actionable recommendations on how to fix them.

Service de test et analyse de sites web : vitesse, SEO, sécurité et qualité. Test gratuit ! Auditez, optimisez et surveillez la performance de vos pages web.

Code faster with Kite’s AI-powered autocomplete plugin for Python and JavaScript developers, featuring Multi-Line Completions. Works 100% locally.

ngrok secure introspectable tunnels to localhost webhook development tool and debugging tool

Test your website across mobile, tablet, and desktop breakpoints.

🎮La seule checklist de performance Front-end qui tourne plus rapidement que les autres. - WilliamDASILVA/Front-End-Performance-Checklist