How to use Page Load Checker
- Paste or load a Lighthouse JSON report (or paste it) into Page Load Checker.
- Click Read report — Page Load Checker processes everything on your device.
- Review the category scores and Core Web Vitals shown below.
About this tool
Page Load Checker is a static, client-side tool with no backend. Page Load Checker reads a Lighthouse or PageSpeed Insights JSON report in your browser and surfaces the headline numbers without a server.
It shows category scores and Core Web Vitals such as LCP, CLS and TBT, read straight from the JSON. It behaves the same on desktop and mobile, with nothing stored remotely.
Frequently asked questions
What is Page Load Checker for?
Page Load Checker runs entirely on your device: add your input, and it checks it locally in real time.
Is Page Load Checker free to use?
Yes — Page Load Checker is completely free, with no usage limits.
Is my input private in Page Load Checker?
Yes — your input never leaves your device; Page Load Checker does all the work in your browser.
What file does Page Load Checker read?
Export a Lighthouse or PageSpeed Insights JSON report and load it into Page Load Checker; it surfaces the scores and Core Web Vitals locally.
Does Page Load Checker work offline?
Once the page has loaded, Page Load Checker keeps working with no network connection.