Can I use pagespeed insights for my localhost website or offline?
Yes.
Use the "Lighthouse" tab from your google chrome dev tools.
This is a great starter tutorial on how to do that: https://www.youtube.com/watch?v=5fLW5Q5ODiE
Edit: user izogfif pointed out the "Audit" tab was replaced by "Lighthouse".
1.4m articles
1.4m replys
5 comments
57.0k users