user11215: I'm looking for a program or website which offers to create chess diagrams using custom piece sets. 
I know many sites and programs that offer this but with a preset types of pieces. This is the case for example for jinchess board editor. So what I'm looking for is a board editor like this one but which gives me the option to edit the pieces set with some png image files I have for a personalized chess set.
I would love as well the possibility to change the board image.
My final aim would be to be able to create a chess position like the one bellow using a chess board editor and not having to copy and paste the image files with an image editor.

To sum up
To sum up I look for a program or website which lets:

Create a chess board position.
Use custom piece set using personalized image files.
Use as board a personalized board image file.

Note: If not a website, the software I'm looking for can be for Mac, Windows, and/or Linux.

user15511: I think you can check Lichess.
It has advanced board editor feature (along with study feature also). It uses stockfish 11 server analysis for analyzing the game, has massive database with millions of games and above all, it is completely FREE.
Go and check that out.

user20428: Not exactly "custom" images but it has over 50 piece designs and 6 board sizes. You can make a "remix" version, as Scratch calls it and replace the piece designs with whatever you like, same goes with the board. The project is here: https://scratch.mit.edu/projects/339815697/
Edit: I've made a new HD Version of this project, it only supports an 8x8 board size but there are now over 160 piece designs and all of them are fully HD! You can use it here: https://scratch.mit.edu/projects/343444076/

11215: <p>I'm looking for a program or website which offers to create chess diagrams using custom piece sets. </p>

<p>I know many sites and programs that offer this but with a preset types of pieces. This is the case for example for <a href="http://www.jinchess.com/chessboard/composer/" rel="noreferrer">jinchess board editor</a>. So what I'm looking for is a board editor like this one but which gives me the option to edit the pieces set with some png image files I have for a personalized chess set.</p>

<p>I would love as well the possibility to change the board image.</p>

<p>My final aim would be to be able to create a chess position like the one bellow using a chess board editor and not having to copy and paste the image files with an image editor.</p>

<p><a href="https://i.stack.imgur.com/0HJXR.png" rel="noreferrer"><img src="https://i.stack.imgur.com/0HJXR.png" alt="Chess board with personalized chess set"></a></p>

<h2>To sum up</h2>

<p>To sum up I look for a program or website which lets:</p>

<ol>
<li>Create a chess board position.</li>
<li>Use custom piece set using personalized image files.</li>
<li>Use as board a personalized board image file.</li>
</ol>

<p><strong>Note</strong>: If not a website, the software I'm looking for can be for Mac, Windows, and/or Linux.</p>
 15511: <p>I think you can check <a href="https://www.lichess.org" rel="nofollow noreferrer">Lichess</a>.
It has advanced board editor feature (along with study feature also). It uses stockfish 11 server analysis for analyzing the game, has massive database with millions of games and above all, it is completely FREE.
Go and check that out.</p>
 20428: <p>Not exactly "custom" images but it has over 50 piece designs and 6 board sizes. You can make a "remix" version, as Scratch calls it and replace the piece designs with whatever you like, same goes with the board. The project is here: <a href="https://scratch.mit.edu/projects/339815697/" rel="nofollow noreferrer">https://scratch.mit.edu/projects/339815697/</a></p>

<p>Edit: I've made a new HD Version of this project, it only supports an 8x8 board size but there are now over 160 piece designs and all of them are fully HD! You can use it here: <a href="https://scratch.mit.edu/projects/343444076/" rel="nofollow noreferrer">https://scratch.mit.edu/projects/343444076/</a></p>
