user4350: I am new to FEN notation. I understand its importance for describing position of pieces on board. I also understand FEN notations after reading about it in Wikipedia. However, it is a time taking procedure to write it down manually. I am looking for a software or web site, which allows me to place the pieces on the board, and then create FEN notation automatically.

user30584: Python has now a chess module, which is able to parse FEN (among other formats), and also output any position to FEN, EDP, PGN and also SVG format. It is as simple as F = input(); B = chess.Board(F) to read in a FEN. Then you can easily extract information or modify the positions, and write it back to a file using B.fen(en_passant='fen') or B.epd(en_passant='fen', ...); to write back a PGN, use chess.pgn; see chapter "Writing" of the documentation, similar for producing SVG.
You can find more information at:

https://python-chess.readthedocs.io
https://github.com/niklasf/python-chess


user6972: I´m in a similar matter.
But what I tried to have is a fen list, not just a single fen line.
That is: having a PGN file, have the complete list of fen, one line per position. 
If for example the game had 40 moves, I need the 40 positions that ocured during the game.
In fact I found one program that do it: pgn2fen: 
http://pgn2fen.downv.com/Windows-software-download/pgn2fen
It has a bug, it does not make the fen for the last position.

user70: SCID will do it.  Create a position using Edit->Setup Board. There's a text box at the bottom of the setup window with the FEN.  Or, if you've been playing against the computer, you can just say Edit->Copy FEN to get the board's current position.

user21827: I use the Lichess Board editor. It has drag and drop, and click and place and it provides the FEN to any position. 

user2042: 
I am looking for a software or web site, which allows me to place the pieces on the board, and then create FEN notation automatically.

I personally use this site for that.
It is free, and it is an online tool.

REMARKS:
If you wish to put that FEN in our diagram you paste that code like this:

Press space bar 4 times;
Type square brackets ( [] );
Type fen "" inside the brackets ( [fen ""] );
Paste your code inside the "" ( [fen "Your FEN goes here"] );

If you decide to input variations you need to do this:

Press enter twice;
Press space bar 4 times;
Input moves;

Here is an example:

If you have further question leave a comment and I will help you. Also read this thread.
END OF REMARKS
Hopefully this answer helps you.
Best regards.

4350: <p>I am new to FEN notation. I understand its importance for describing position of pieces on board. I also understand FEN notations after reading about it in Wikipedia. However, it is a time taking procedure to write it down manually. I am looking for a software or web site, which allows me to place the pieces on the board, and then create FEN notation automatically.</p>
 30584: <p>Python has now a <code>chess</code> module, which is able to parse FEN (among other formats), and also output any position to FEN, EDP, PGN and also SVG format. It is as simple as <code>F = input(); B = chess.Board(F)</code> to read in a FEN. Then you can easily extract information or modify the positions, and write it back to a file using <code>B.fen(en_passant='fen')</code> or <code>B.epd(en_passant='fen', ...)</code>; to write back a PGN, use <code>chess.pgn</code>; see <a href="https://python-chess.readthedocs.io/en/latest/pgn.html#writing" rel="nofollow noreferrer">chapter &quot;Writing&quot; of the documentation</a>, similar for producing SVG.</p>
<p>You can find more information at:</p>
<ul>
<li><a href="https://python-chess.readthedocs.io" rel="nofollow noreferrer">https://python-chess.readthedocs.io</a></li>
<li><a href="https://github.com/niklasf/python-chess" rel="nofollow noreferrer">https://github.com/niklasf/python-chess</a></li>
</ul>
 6972: <p>I´m in a similar matter.
But what I tried to have is a fen list, not just a single fen line.
That is: having a PGN file, have the complete list of fen, one line per position. 
If for example the game had 40 moves, I need the 40 positions that ocured during the game.</p>

<p>In fact I found one program that do it: pgn2fen: 
<a href="http://pgn2fen.downv.com/Windows-software-download/pgn2fen" rel="nofollow noreferrer">http://pgn2fen.downv.com/Windows-software-download/pgn2fen</a>
It has a bug, it does not make the fen for the last position.</p>
 70: <p>SCID will do it.  Create a position using <code>Edit-&gt;Setup Board</code>. There's a text box at the bottom of the setup window with the FEN.  Or, if you've been playing against the computer, you can just say <code>Edit-&gt;Copy FEN</code> to get the board's current position.</p>
 21827: <p>I use the <a href="https://lichess.org/editor" rel="nofollow noreferrer">Lichess Board editor</a>. It has drag and drop, and click and place and it provides the FEN to any position. </p>
 2042: <blockquote>
  <p>I am looking for a software <strong>or web site</strong>, which allows me to place the pieces on the board, and then create FEN notation automatically.</p>
</blockquote>

<p>I personally use <a href="http://www.apronus.com/chess/wbeditor.php" rel="nofollow noreferrer">this site</a> for that.</p>

<p>It is free, and it is <strong>an online tool.</strong></p>

<p><img src="https://i.stack.imgur.com/Ma7Ld.png" alt="enter image description here"></p>

<p><strong>REMARKS:</strong></p>

<p><em>If you wish to put that FEN in our diagram you paste that code like this:</em></p>

<ol>
<li>Press space bar 4 times;</li>
<li>Type square brackets ( <code>[]</code> );</li>
<li>Type <code>fen ""</code> inside the brackets ( <code>[fen ""]</code> );</li>
<li>Paste your code inside the <code>""</code> ( <code>[fen "Your FEN goes here"]</code> );</li>
</ol>

<p><em>If you decide to input variations you need to do this:</em></p>

<ol start="5">
<li>Press enter twice;</li>
<li>Press space bar 4 times;</li>
<li>Input moves;</li>
</ol>

<p>Here is an example:</p>

<p><img src="https://i.stack.imgur.com/a3eLm.png" alt="enter image description here"></p>

<p><em>If you have further question leave a comment and I will help you. Also read <a href="https://chess.meta.stackexchange.com/questions/373/can-i-post-an-annotated-pgn-chess-board-in-chess-stackexchange-com">this thread</a>.</em></p>

<p><strong>END OF REMARKS</strong></p>

<p>Hopefully this answer helps you.</p>

<p>Best regards.</p>
