@scooterdud
If it is html code you can use a widget or inline code on a post or you can custom one of the skin pages.

If you want to use php in the code it will have to be a custom skin page.

If you are more specific i.e. provide lots more detail (version, skin, screen shot of where you want it and the code you want to embed) then it will be posible to provide more help.

Here is the code i want to use: <iframe width="100%" height="650px" frameborder="0" src="https://esimenseninfo.speedtestcustom.com"></iframe>

I hope i can embed this code in a stadalone page ???? And i using the standard skin.

You can just embed the code in a new page as html

Have a look at my example(s)
a) got to http://calstock.org.uk and you will see two weather iframes embeded

b) click on the post 'test' in the right column and you will see your thing

I have a new post with the following text

<div style="width: 100%; height: 26em; overflow:hidden; margin-top:-0.6em">te<iframe style=" width:100%; height:23em; border-radius:0.6em; border:1px solid green" src="https://speedtestcustom.com"></iframe>st</div>

Further I wonder why you want a whole page for this when you can just have a link that will open a new page or a new tab on the browser.

See my site https://calstock.org.uk and scroll down the left hand side column and see the link OOKLA Try it, although it works on a UK server.

And too your initial query ?? Didn't you just try to add the code to a page - that's what the embed HTML text is for ??

You are right that I can only create a menu for the OOKLA Speedtest. Haven't used b2evolution so much, please tell me how to create a menu button on the top of the page

If you don't know how to add a link to a page, post then you have problems.
But it's simple.
<div class="promote"> <a href="http://speedtest.net.uk/" target="_blank"><img src="../../rsc/img/ookla.png" title="Broadband Speed Test" alt="ookla speed test" /></a></div>

In the above case I have put the link in a div and given it a class so I can format it. There's an image I made and I used the image in place of text for a link.

a) you really ought to know how to do this ?? and
b) you could just have got all this info from my site or generically you can read the source code of any site with a link
c) you can seach on line for how to make a link

I feel I'm leading you by the hand a lot and that's a bit offputting. Please try and do something and then report if you have problems, but this is not a b2evolution problem it is a simple excersise in HTML coding so search other sites for HTML coding if you have an issue. https://www.w3schools.com/html/html_links.asp

Hope that's not too harsh for you :)

All the best

Update :: I'm removing the test post from my site.

My question was not about how to create a link, I can and a bit more. My question was about how to place the link in the menu at the top of the page, not in a widget, which I found out a long time ago.

You are not clear enough still, you could have provided a screen shot of where you want it ?

I don't know what your menu looks like as you didn't provide ( a screen shot ~ a URL ~ a version ) as I had asked and is recommended for any query. See https://forums.b2evolution.net/

Then, if you haven't found an answer, please start a new topic in the forum that best matches your request and provide all the information requested (screenshots, etc.)

When you start a new post there is a request for all the information that is wanted.

There is a widget called FreeHTML where you can put the code and then put the widget where you want. ??

If you use the standard Menu Container then just add the widget with the code.