Page Load Timer

About

Instant page load performance at a glance - no DevTools required.

Page Load Timer shows real performance data for any website you visit. Click the icon and see exactly how the page loaded: total time, Core Web Vitals, phase-by-phase timeline, and the slowest resources dragging it down.

👉 WHAT YOU GET

Page Load / FCP / LCP - the three numbers that matter most, front and center.

Load Timeline - see where time is spent: Redirect, DNS, Connect, Request, Response, DOM processing. The slowest phase is highlighted so you spot the bottleneck immediately.

Top Slow Resources - the 10 slowest assets on the page, sorted by load time. Each one is tagged by type (JS, CSS, IMG, XHR, FONT) so you know what to optimize first. Resources over 500 ms are flagged in red.

Badge on Icon - the extension icon shows the load time in seconds, color-coded: green (under 1s), orange (under 3s), red (over 3s). You can see page speed without even opening the popup.

👉 WHO IT'S FOR

- Web developers checking performance without opening DevTools
- QA engineers verifying page speed during testing
- SEO specialists auditing Core Web Vitals across pages
- Anyone curious about how fast (or slow) websites really are

👉 CUSTOMIZABLE

- Theme: Auto (follows your OS), Light, or Dark
- Density: Roomy, Default, or Compact - fits your preference
- Toggle sections on/off: hide the timeline or resources table
- Badge on/off: disable the icon badge if you prefer a clean toolbar
- All settings are saved and persist across sessions

👉 LIGHTWEIGHT AND PRIVATE

- Under 20 KB total. No frameworks, no dependencies, no build step.
- Manifest V3. Runs as a service worker - no persistent background page.
- All data stays local in your browser. Nothing is sent anywhere, ever.
- No analytics, no tracking, no external requests.
- Minimal permissions: only activeTab, storage, scripting, and tabs.
- Open source: https://github.com/denisrasulev/page-load

👉 HOW IT WORKS

When a page loads, the extension captures navigation timing and Web Vitals (FCP and LCP via PerformanceObserver). It groups and ranks resources by load time. Open the popup to see everything. For tabs that were already open, it collects data on demand - just click the icon.