You can see the real me If you just try hard a bit, what am I?

Question

Hello I am new and this is my first riddle, sorry for the bad english!

You should guess what am I

I'll tell you Mark is my name

There are many friends of mine

but I'm the easier to tame

I won't talk so much about my head

I'll just let you know that without it I wouldn't be dead

Let's talk about my body

I don't have any legs, arms or horns

but it can have many shapes or forms

I am all over the world

You can find me if you search far and wide

Try to look near the spider's lair

You can see the real me

If you just try hard a bit

What is it?

Answer 1

Is it HTML?

I'll finish explaining later if it is :D I'll tell you Mark is my name

HTMarkupL

There are many friends of mine

Basic web language

but I'm the easier to tame

Easy to use and no errors shown on screen even when code isn't right

I won't talk so much about my head

Head is part of html script you don't see without looking at the code

I'll just let you know that without it I wouldn't be dead

Html works without head

Let's talk about my body

body is an important part of HTML code

I don't have any legs, arms or horns

Don't know for this one yet

but it can have many shapes or forms

Html changes with CSS?

I am all over the world

On the internet

You can find me if you search far and wide

World Wide

Try to look near the spider's lair

The web

You can see the real me

If you just try hard a bit

Source code examined with with browser