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page speed insight

4 0 1

pageSpeed Insight is not showing any results for shopify store. i tried many times but every time i am gettings same error. i try to test 2 other stores as well getting same error. 

Oops! Something went wrong.
Lighthouse returned error: NOT_HTM L. The page provided is not H T M L(served as MIME type text/plain).
Replies 9 (9)
Shopify Expert
10921 193 2198

What is the url you are testing?

★ I jump on these forums in my free time to help and share some insights. Not looking to be hired, and not looking for work. ★
Shopify Partner
3 0 1

Absolutely, Shopify has constant problems with this after the Google PageSpeed Insigh update

4 1 0

I have experienced the same issue. with the page speed insights returns "No data" for my store URLs. Shopify IT supported team said its something we did with the header code change. Have you reached out to them?

Shopify Partner
20 0 2



The page speed insights site is where this problem occurs. Lighthouse still works in the chrome dev tools. 


You can install Lighthouse for chrome plugin/extension first. Then view it using ctrl + shift + I.  Where you can see a new Lighthouse tab. Click the performance checkbox and analyse. 


Note : use this in incognito if you have lot of other extensions on chrome.

Shopify Speed Booster Application
Shopify Partner
12491 1931 2479

Hi @jamesadam ,

Share your store url.

Please Like and Accept Solution. Free website audit to grow your business Chat on WhatsApp | Email: | Skype : oscprofessionals-87 | Hire us | Expert Site Speed Optimization | Performance Site Audit | Shopify Private App | Custom Theme Development & Modifications any Shopify Theme | Shopify SEO | Digital Marketing
Shopify Partner
20 0 2

The fix for this issue was released . Page speed insights is working now .



Shopify Speed Booster Application
New Member
1 0 0

Hey, Hope you are doing well. I want to adjust its speed according to speed insight. Kindly, guide me....


Regards: @sub

Shopify Expert
695 52 132

Hi @jamesadam 


Welcome to the Shopify Community!

I am Alex From MS Web Designer (Top Rated Shopify Certified Experts and eCommerce Consultant from Singapore ) I helped 1000+ Shopify Store owners to Optimize their website loading speed for both mobile and desktop and increase their conversion rate.

I will love to help you with some experts feedback here

- Kindly Provide your Store Url,
- Also Mention Which Shopify theme you are using

- How many Apps you are using?

Note: If your store is protected with ‘store Font password’ please Send it here or DM me.

If you have any concerns feel free to ask me!


MS Web Designer  | Top Rated Shopify Experts in Singapore
20,000+ Tasks Completed | 1500+ Happy Clients

Want to Improve Shopify Store Speed, Redesign or custom changes, or Small tweaks on store hire me.Try Our Free Shopify App
If helpful then please Like and Accept Solution

Shopify Partner
3 0 1

Hello Oliver, I’m Paul , the Head of ! I’m top rated Upwork developer, have made more 200+ speed optimization projects. We provide a unique service to Speedup your store. It doesn’t matter how many apps/project you have on store, we will install our special software on your site and will adapt for any updates on site in the future, so you don’t need always looking for developers who can help you with site. We guarantee 70+ for mobile, 80+ desktop by Google PageSpeed + 2 free weeks guaranteed period for any issues related to speed optimization. To get more information plz visit our site or contact me, thank you.