diff --git a/app.py b/app.py
index 1ff595f..0325e0f 100644
--- a/app.py
+++ b/app.py
@@ -5,6 +5,7 @@ import requests
 from flask import Flask, render_template_string, request, send_from_directory
 from PIL import Image, ImageDraw, ImageFont
 import re
+import argparse
 
 app = Flask(__name__)
 app.secret_key = 'TpfxYMxUJxJMtCCTraBSg1rbd6NLz38JTmIfpBLsotcI47EqXU'
@@ -254,6 +255,7 @@ HTML_FORM = '''
     </center>
     <form method=post enctype=multipart/form-data>
       <textarea name=md placeholder="Ingrese Markdown aquí...">{{ default_md }}</textarea><br>
+      <input type="file" name="userimg" accept="image/png, image/jpeg" style="margin: 0 0.25em 1.5em 0.25em"><br>
       <div class="buttons">
         <button type=submit name="generate">📷 Generar</button>
         <button type=submit name="print">🖨️ Imprimir</button>
@@ -289,6 +291,7 @@ HTML_FORM = '''
       <li><b>Lista numerada:</b> <code>1. Elemento</code></li>
       <li><b>Imágen:</b> <code>![Texto alternativo](Enlace a imágen)</code></li>
       <li><b>Salto de línea:</b> Deje una línea vacía</li>
+      <li><b>Imagen subida:</b> <code>!(img)</code> (usa la imagen cargada abajo)</li>
     </ul>
   </div>
 </div>
@@ -309,7 +312,22 @@ def bleh_image_from_url(url):
         img = img.resize((IMAGE_WIDTH, img.height), Image.LANCZOS)
     return img
 
+def bleh_image_from_bytes(image_bytes):
+    bleh = subprocess.Popen(
+        ["./bleh", "-o", "-", "-mode", "1bpp", "-d", "floyd", "-"],
+        stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE
+    )
+    out, err = bleh.communicate(image_bytes)
+    if bleh.returncode != 0:
+        raise RuntimeError(f"Driver failed: {err.decode()}")
+    img = Image.open(io.BytesIO(out)).convert("L")
+    if img.width != IMAGE_WIDTH:
+        img = img.resize((IMAGE_WIDTH, img.height), Image.LANCZOS)
+    return img
+
 def parse_line(line):
+  if re.match(r"!\(img\)", line) or re.match(r"!\[.*\]\(img\)", line):
+      return ('userimage', None)
   image_match = re.match(r"^!\[(.*?)\]\((.+?)\)", line)
   if image_match:
       alt = image_match.group(1)
@@ -406,7 +424,7 @@ def wrap_segments(segments, font, font_bold, font_italic, font_bolditalic, max_w
     if line:
         yield line
 
-def render(md):
+def render(md, uploaded_img_bytes=None):
     font = ImageFont.truetype(FONT_PATH, FONT_SIZE)
     font_bold = ImageFont.truetype(FONT_PATH_BOLD, FONT_SIZE)
     font_italic = ImageFont.truetype(FONT_PATH_OBLIQUE, FONT_SIZE)
@@ -422,13 +440,22 @@ def render(md):
         if src_line.strip() == '':
             lines_out.append(('blank', []))
             continue
-        tag = parse_line(src_line)
+        tag = parse_line(src_line)            
         if tag[0] == 'image':
             try:
                 image = bleh_image_from_url(tag[1])
                 lines_out.append(('image', image))
             except Exception as e:
                 lines_out.append(('text', [('text', f"[Imagen inválida: {e}]")], font, FONT_SIZE))
+        elif tag[0] == 'userimage':
+          if uploaded_img_bytes:
+            try:
+                image = bleh_image_from_bytes(uploaded_img_bytes)
+                lines_out.append(('image', image))
+            except Exception as e:
+                lines_out.append(('text', [('text', f"[Error al procesar imágen subida: {e}]")], font, FONT_SIZE))
+          else:
+            lines_out.append(('text', [('text', "[No se subió una imagen]")], font, FONT_SIZE))
         elif tag[0] == 'hr':
             lines_out.append(('hr',))
         elif tag[0] == 'header':
@@ -549,8 +576,12 @@ def index():
     printed = False
     error = None
     if request.method == "POST":
+        userimg = request.files.get("userimg")
+        uploaded_img_bytes = None
+        if userimg and userimg.filename:
+          uploaded_img_bytes = userimg.read()
         md = request.form["md"]
-        image = render(md)
+        image = render(md, uploaded_img_bytes)
         buf = io.BytesIO()
         image.save(buf, format="PNG")
         buf.seek(0)
@@ -593,4 +624,7 @@ def icon_rounded():
     return send_from_directory('static', 'icon512_rounded.png')
 
 if __name__ == "__main__":
-    app.run(host="0.0.0.0")
+    parser = argparse.ArgumentParser(description='CatNote: Server for Markdown to MXW01 Cat Printer')
+    parser.add_argument('-p', '--port', type=int, default=5000, help='Port to run the server on (default: 5000)')
+    args = parser.parse_args()
+    app.run(host='0.0.0.0', port=args.port)