Yslow.org
YSlow - Official Open Source Project Website
YSlow analyzes web pages and gives suggestions to help you boost site speed and performance using proven rules for high-performance websites.
Get instant tips to speed up your website
YSlow is a free tool that helps you understand why your website might be running slow. By analyzing your web pages against a proven set of performance rules, it highlights what’s holding your site back and shows you how to make it faster.
Whether you’re a developer, designer, or site owner, you can use YSlow to get clear, actionable suggestions for improving your site’s speed. The tool breaks down each issue so you know exactly what to fix, making optimization simple even if you’re not a performance expert.
With easy-to-follow recommendations and open source support, YSlow is a handy companion for anyone looking to deliver a faster, smoother web experience for their visitors.
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