Converting the image format of logos
<p>I am developing a website and want to list the logos of the technologies I used in the footer. For this purpose, I am looking to use <code>svg</code> images as it would be scalable at resolutions. I am able to get the relevant logos from the technology developers' press kits but some of them are not in the format I want (like they are in <code>jpeg</code> or <code>png</code>). I can easily convert these images using freely available tools to <code>svg</code>. My question is, am I allowed to do so, or am I restricted to use only those formats that were supplied by them.
The technologies in question are:</p>

<p><a href="https://www.mongodb.com/pressroom" rel="nofollow noreferrer">MongoDB</a></p>

<p><a href="https://expressjs.com/" rel="nofollow noreferrer">Express</a> - note: They don't have any guidelines on how to use their image</p>

<p><a href="https://nodejs.org/en/about/resources/" rel="nofollow noreferrer">Node.Js</a></p>

<blockquote>
  <p>I am developing a website and want to list the logos of the
  technologies I used in the footer.  [...] My question is, am I allowed
  to do so, or am I restricted to use only those formats that were
  supplied by them.</p>
</blockquote>

<p>The relevant areas of law here are (at least):</p>

<ul>
<li>copyright law</li>
<li>trademark law</li>
</ul>

<h1>Copyright law</h1>

<p>Copyright law says that (almost) <em>any use</em> of a protected work (or a work based on it) requires permission of the copyright holder. This certainly includes putting the images on your website. People <a href="https://www.contentfac.com/copyright-infringement-penalties-are-scary/" rel="nofollow noreferrer">get sued and pay huge sums for putting images on the web without permission</a>.</p>

<p>So the first thing is: You need the copyright holder's permission to post <em>any</em> image in <em>any</em> form. If you intend to modify the image, you will need express permission to do that, too (in addition to the permission to use it in the first place). Now, strictly speaking, a mere conversion to a different file format may or may not count as a modification in the copyright sense (as the image still looks the same), but I wouldn't risk it.</p>

<h1>Trademark law</h1>

<p>In addition to copyright law, posting an image that serves as a company logo could get you in trouble with trademark law. Details vary a lot between jurisdictions, but basically: If you use the logo in a way that could imply that you are affiliated to the company or endorsed by them, that could land you in trouble. Again, to be on the safe side, you need explicit, written permission to use the logo.</p>

<p>In the case of trademark law, there are arguably more exceptions than with copyright law - for example, use of the logo is usually allowed if you make it clear you are only reporting on the company. But that is tricky to get right, so be careful.</p>

<hr>

<p>To address your specific case:</p>

<ul>
<li>You will need each company's permission to use their logos. They will tell you exactly what you may or may not do.</li>
<li>Many companies actually want you to display their logo. These companies will often have a page with logos you can use. For example, MongoDB has a page <a href="https://www.mongodb.com/brand-resources" rel="nofollow noreferrer">Brand Resources</a> with logos. If such a page exists (and it really is from the company), then that is usually sufficent permission to use the logo. However, the page will usually state conditions for use (such as no modifications) - you must follow these conditions.</li>
</ul>

copyright