Speed Analyzer

Free Chrome extension that measures page load performance with detailed metrics, A-F grading, and actionable optimization tips.

Features

DOM Content Loaded, Page Load, TTFB, request count, DOM elements, and estimated page size — all at a glance.

Instant visual score from A (under 1 s) to F (over 5 s) with a color-coded circular gauge.

Specific suggestions: slow TTFB, too many DOM nodes, large page size, excessive requests, and more.

Last 5 analyses saved locally so you can compare performance across different pages and sessions.

How does Speed Analyzer measure performance?: It uses the browser's native Performance API (Navigation Timing and Resource Timing) to capture accurate load metrics directly from Chrome.
Is my data sent anywhere?: No. All analysis runs locally in your browser. History is stored in chrome.storage.local and never leaves your machine.
Which pages can I analyze?: Any page you can visit in Chrome. Click the extension icon, press "Analyze This Page," and get instant results.