How to use Website Speed Test On Mobile
- Add a Lighthouse JSON report (or paste it) to Website Speed Test On Mobile to get started.
- Press Read report to run it locally in your browser.
- Use the category scores and Core Web Vitals Website Speed Test On Mobile produces — nothing was uploaded.
About this tool
Everything Website Speed Test On Mobile does happens on your own device. Export a report from Chrome DevTools or PageSpeed Insights and load the JSON into Website Speed Test On Mobile to see the scores locally.
Because Website Speed Test On Mobile parses a report you provide, the results match whatever run you exported. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
What does Website Speed Test On Mobile do?
Use Website Speed Test On Mobile to check your input without installing anything; everything happens client-side.
Does Website Speed Test On Mobile cost anything?
No — Website Speed Test On Mobile is completely free, with no sign-up and no hidden limits.
Where is my data processed by Website Speed Test On Mobile?
Entirely in your browser — Website Speed Test On Mobile keeps your data on your own machine and sends nothing anywhere.
What file does Website Speed Test On Mobile read?
Export a Lighthouse or PageSpeed Insights JSON report and load it into Website Speed Test On Mobile; it surfaces the scores and Core Web Vitals locally.
Can I use Website Speed Test On Mobile without a connection?
Yes — after the first load Website Speed Test On Mobile runs entirely offline.