diff --git a/hashquines/README.html b/hashquines/README.html
index b7b60df..8be5799 100644
--- a/hashquines/README.html
+++ b/hashquines/README.html
@@ -152,6 +152,12 @@ <h1 id="examples">Examples</h1>
 <li>a PNG hashquine by <em>David 'Retr0id' Buchanan</em></li>
 </ul>
 <p><img src=pocs/hashquine_by_retr0id.png height=600></img></p>
+<ul>
+<li>a <a href="pocs/jxl_hashquine.jxl">JPEG XL hashquine</a> by <em>itszn</em></li>
+<p>View the JPEG XL file if your browser can render it: <a href="pocs/jxl_hashquine.jxl">View JPEG XL hashquine</a></p>
+<p>Otherwise here is a render of it in PNG:</p>
+</ul>
+<p><img src=pics/jxl_hashquine.png height=400></img></p>
 <h2 id="archive-hashquines">Archive hashquines</h2>
 <p>Decompressing these archives gives the hash of the whole archive.</p>
 <ul>
diff --git a/hashquines/README.md b/hashquines/README.md
index acafa13..57b8e8e 100644
--- a/hashquines/README.md
+++ b/hashquines/README.md
@@ -110,6 +110,14 @@ Cf self-descriptive image (here as PNG):
 
 <img src=pocs/hashquine_by_retr0id.png height=600></img>
 
+- a [JPEG XL hashquine](pocs/jxl_hashquine.jxl) by *itszn*
+
+View the JPEG XL file if your browser can render it: [View JPEG XL hashquine](pocs/jxl_hashquine.jxl)
+
+Otherwise here is a render of it in PNG:
+<img src=pics/jxl_hashquine.png height=400></img>
+
+
 
 ## Archive hashquines
 
diff --git a/hashquines/pics/jxl_hashquine.png b/hashquines/pics/jxl_hashquine.png
new file mode 100644
index 0000000..1a75aca
Binary files /dev/null and b/hashquines/pics/jxl_hashquine.png differ
diff --git a/hashquines/pocs/jxl_hashquine.jxl b/hashquines/pocs/jxl_hashquine.jxl
new file mode 100644
index 0000000..8a1a3b9
Binary files /dev/null and b/hashquines/pocs/jxl_hashquine.jxl differ