How to use Website Speed Report
- Paste or load a Lighthouse JSON report (or paste it) into Website Speed Report.
- Hit Read report and Website Speed Report computes the result client-side.
- Read the category scores and Core Web Vitals that Website Speed Report lays out for you.
About this tool
There is no server behind Website Speed Report. Export a report from Chrome DevTools or PageSpeed Insights and load the JSON into Website Speed Report to see the scores locally.
Because Website Speed Report parses a report you provide, the results match whatever run you exported. Your input never leaves the page, and no account or install is required.
Frequently asked questions
What is Website Speed Report for?
Use Website Speed Report to process your input without installing anything; everything happens client-side.
Does Website Speed Report cost anything?
No — Website Speed Report is completely free, with no sign-up and no hidden limits.
Where is my data processed by Website Speed Report?
Entirely in your browser — Website Speed Report keeps your data on your own machine and sends nothing anywhere.
What file does Website Speed Report read?
Export a Lighthouse or PageSpeed Insights JSON report and load it into Website Speed Report; it surfaces the scores and Core Web Vitals locally.
Can I use Website Speed Report without a connection?
Yes — after the first load Website Speed Report runs entirely offline.