Wich of these senteces is more correct in english?

The html, as generated, is completely functional although improvements in the coding are necessary.

1) The html generated is not the best, but it works.

2) The generated html is fully functional, even if not perfectly coded.

They both sound OK...... I'm not sure how "technical" what you're writing is.

3) The generated html is fully functional although not perfectly coded.

Number 2 is more correct.

The generated html works but is not perfectly coded.

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If you say fully functional it means there is nothing wrong with it.

fully means 100% .

if you want you can say:

The generated html functions well but is not perfectly coded.

Based on other programming languages HTML is cumbersome, incomplete, and a terrible language to work with.

OR

HTML as a programming language would have been laughed at if it was included with the TI-99/4A, Commodore 64, or IBM PC Jr. One giant leap for mankind… Unfortunately, backwards!

The html isn't perfect, but it functions.

the second is better

but you could also say:

the html generated works, but can be coded better.

#1 is better. It's simpler and uses fewer words to say the same thing as the second one.

the second one

depends what language it originated the translation from .

i would say nr.2