Performance / Frontend
Loading performance, resources and layout checks.
This collection of performance and frontend tools is for anyone who needs to check how fast their website responds and renders. It helps you measure server response time (TTFB) and total page weight, evaluate image format choices (WebP and AVIF), review resource hints (preload, preconnect, dns-prefetch) and caching strategies (Cache-Control, ETag), and understand the Core Web Vitals (LCP, CLS, INP) that directly affect your Google search ranking. It is especially useful for bloggers, store owners, and frontend developers who are losing visitors to slow load times or want to raise their page speed score.
A typical performance check follows a measure, diagnose, fix, and re-measure loop. Start by pulling objective numbers like TTFB and page weight to see whether the bottleneck is slow server response or heavy images and scripts. Then tackle the highest-impact, lowest-effort items first such as converting images to modern formats, setting proper cache headers, and adding the resource hints you actually need. Finally, run the same tools again to confirm that your Core Web Vitals genuinely improved rather than just guessing.