Der Platz ganz vorne ist noch frei.

Because der Platz is the subject of the sentence.

• der Platz = nominative
• den Platz = accusative
• dem Platz = dative

In Der Platz ganz vorne ist noch frei, the seat/place is the thing being described, so it must be in the nominative case.

A rough structure is:

• Der Platz = the seat / the place
• ist = is
• noch frei = still free / still available

So der Platz is the thing that is free.

In this sentence, Platz usually means seat, spot, or place.

German Platz can mean different things depending on context:

• seat: a place to sit
• spot: a particular location
• space/room: available space
• square: a town square, in other contexts

Here, because of ganz vorne and frei, it most naturally means something like:

• the seat at the very front
• the spot right at the front

So the exact English word depends on the situation.

Because it describes which Platz is being talked about.

ganz vorne means right at the front or all the way in front. It works here almost like an adverbial phrase attached to der Platz:

• Der Platz ganz vorne = the seat right at the front

German often allows this kind of descriptive phrase after the noun without changing the basic meaning.

So the sentence divides like this:

• Der Platz ganz vorne = the place right at the front
• ist noch frei = is still free

It could be phrased that way, but it sounds a bit different.

Compare:

• der Platz ganz vorne = the seat right at the front
• der ganz vordere Platz = the very front seat / the frontmost seat

The version with ganz vorne sounds very natural in everyday speech, especially when pointing out a location.

It is often easier to think of it as:

• Platz = noun
• ganz vorne = location phrase describing where that place is

So instead of building everything into one adjective phrase, German often uses a more conversational structure.

vorne means in front or at the front.

In everyday German, vorne and vorn are very close in meaning:

• vorne = at the front / in front
• vorn = shortened form of vorne

Examples:

• Ich sitze vorne. = I’m sitting at the front.
• Ich sitze vorn. = same meaning

In your sentence, ganz vorne is very common and natural.

Here ganz does not mean whole. It means something like completely, quite, or right for emphasis.

So:

• vorne = at the front
• ganz vorne = right at the front / all the way at the front

This use of ganz is very common:

• ganz hinten = right at the back
• ganz oben = right at the top
• ganz unten = right at the bottom

noch here means still.

So:

• ist frei = is free / is available
• ist noch frei = is still free / is still available

It suggests that the seat has not been taken yet.

That small word is very common in German, but it has several meanings depending on context, such as:

• still
• yet
• another / one more
• in addition

In this sentence, the correct sense is still.

Here it means available / unoccupied, not free of charge.

German frei can mean different things:

• available / unoccupied
  
  • Der Platz ist frei.
• free / not busy
  
  • Ich bin morgen frei.
• free / not restricted
  
  • Der Eintritt ist frei. = admission is free

In this sentence, because it is about Platz, frei means the seat or spot is not taken.

It is still in the second position—just not the second word.

German main clauses usually follow the V2 rule: the finite verb comes in the second sentence element.

Here the first element is the whole subject phrase:

• Der Platz ganz vorne = first element
• ist = second element

So even though ist is the third word, it is the second unit in the sentence.

That is a very important difference in German: position means grammatical slot, not simply word count.

Yes, that is possible.

German lets you move different elements into the first position for emphasis. For example:

• Der Platz ganz vorne ist noch frei.
• Ganz vorne ist der Platz noch frei.

The second version highlights the location first: At the very front, the seat is still free.

But the original version is more neutral if you simply want to identify the seat.

Because ganz vorne is just part of the noun phrase and does not need to be separated by a comma.

German does not use commas as freely as English for short descriptive elements like this.

So this is written normally as:

• Der Platz ganz vorne ist noch frei.

A comma would usually feel wrong here.

It can be either, depending on context.

For example, it could mean:

• a seat in a classroom
• a place in a row
• a spot in a car or bus
• a space at the front of a room

German Platz is broad enough to cover all of these. The sentence itself does not force one specific interpretation.

Sometimes, yes, depending on context, but still available or still free is usually the safest translation.

If this is about a seat or spot, English would most naturally say:

• is still free
• is still available
• is still open is possible, but less common for a seat

So grammatically it works, but idiomatically available is often the best choice in English.

It is best understood here as an adverbial/local phrase describing location.

• vorne is an adverb
• ganz intensifies it

Together they describe where the place is:

• where is the Platz? — ganz vorne

That is why the sentence feels a bit different from something like:

• der vordere Platz = the front seat

Both are possible, but der Platz ganz vorne sounds more like spoken, situational German: the place that is located right at the front.