Change permalinks structure without affect SEO

Hi, i want to change my permalinks to /%category%/%postname%/ and i also want to implement https for my blog. Can i do both in 1 shot?

What is the method to implement https and change permalinks without affect SEO?

First you need to change permalinks and redirect all from old URL to new URL. You can use redirection plugin.
After this is done, move your site over HTTPS.

should be put 301 redirection codes...its not affect in SEO. Link equity is passed

https is not worth it.

new structure .. there are plugins in wp as far i know (dont use wp myself)

W9go said:

https is not worth it.

new structure .. there are plugins in wp as far i know (dont use wp myself)

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What you mean of https is not worth? Is it not advisable for https? Any reason?

Changing your permalink would definitely fluctuate your site's SERP ranking for the next 1-2 weeks and I don't think there would be any exception.
Unless if absolutely necessary, I don't think you should change the permalink, if you are already enjoying good ranking in the SERP - you don't want jumping into a hot pan instead.
But if SERP ranking isn't the primary concern, you can definitely change the permalink anytime, and there are SEO plugins, which can help you redirect all traffic to the https version once implemented.