Unused javascript / CSS (google pagespeed)

[Barbara_Bichler]

How can I - as a non coder - identify and remove unused javascript and CSS in order to speed up my website? My website speed seems to be pretty ok on desktop (90) but horrible on mobile (60).

And second question: which free tools are you using in order to convert images to webp?

Thanks a lot in advance.

[Andre]

Hi there @Barbara_Bichler ,

hope you are doing okay Well, if you have no experience in code I strongly advise against removing code yourself. However, I am sure the community here will help out, if you need any help.

60 is not really THAT bad and I see Google page speed more like a guideline or benchmark @Lucian_Dinu actually gave a great answer about that here:

Lighthouse / PageSpeed - Unused JavaScript

Dears, when checking with Google (Lighthouse or PagesSpeed), I get proposal to reduce unused JS on most of the websites I bult with Sitejet. Is this typical for a website builder in general, or for Sitejet, or am I doing something inefficient myself? Any of you encountered the same problem? kind regards Mark

@malte also gave an insight to this topic:

Lighthouse / PageSpeed - Unused JavaScript

As was already said in this thread, the suggestions given by the tools are just best practice suggestions and don’t necessarily have to have a high impact on the actual score. The JS is bundled and minified so it’s downloaded in one piece. It’s not larger than a single regular image and is even downloaded after the content has already been rendered (<script> tags are embedded before the closing </body> tag). So even if we removed most of the JS it would probably only have a very tiny effect on …

If you like, please give us the link to your website, and we have a look with you.

Second question: If you do not use Photoshop e.g. you could probably use any free converter that you find via a search. Like this one here: WEBP Converter | CloudConvert

Tried that one and did not have any issue yet.

[Barbara_Bichler]

Thank you very much!! This is so helpful!

I will definitely NOT play with removing code myself! But I wondered if I make seriouse mistakes when building Sitejet websites.

I have seen the “unused JS” information on each website I build with Sitejet so far. So I can ignore it for the moment as it is “normal”? Do I understand this right?

A future client of mine checked my website in Google Page Speed and wondered if these results are good enough (and what my opinion is about this). I took it also like a guideline but - yes - I think I could do a few things to improve (like using webp format etc.) I just have Photoshop Elements and PS Express so I will use the converter tool you suggested.

[Andre]

When you are finished, feel free to send us the domain to check, if you like.

In case you are not happy with sharing this openly, feel free to send it to me via PN or as a ticket (adressed to me) with reference to this thread

[Barbara_Bichler]

Barbara Bichler

[Andre]

@Barbara_Bichler

https://www.barbara-bichler.de/

Ah great! Yes, I can see that the pictures is a big issue. Pictures in the right dimensions and format. I suppose, the performance should be much better when these issues are solved

[Barbara_Bichler]

Thanks a lot.

[Martin]

Hi @Barbara_Bichler,

I use Resize image files online - Editor that allows you to resize pictures to resize my images.

[Andre]

Compress-Or-Die is also great.

[zachary]

That name just cracked me up. Gotta check that out