diff --git a/app/assets/javascripts/01-types.js b/app/assets/javascripts/01-types.js
index ba053dec..8a23a46f 100644
--- a/app/assets/javascripts/01-types.js
+++ b/app/assets/javascripts/01-types.js
@@ -146,32 +146,49 @@ const typesWithProperties = {
 	img: {
 		checkFn: blocks.img.checkFn,
 		updateInput (el, editorEl) {
-			const imgSrcEl = editorEl.querySelector("*[data-prop=\"img-src\"]")
-			imgSrcEl.disabled = false
-			imgSrcEl.value = el.src
+			const imgFileEl = editorEl.querySelector(`*[data-prop="img-file"]`)
+			imgFileEl.disabled = false
+			// XXX: No se puede cambiar el texto, ¡esto puede ser confuso!
 
-			const imgAltEl = editorEl.querySelector("*[data-prop=\"img-alt\"]")
+			const imgAltEl = editorEl.querySelector(`*[data-prop="img-alt"]`)
 			imgAltEl.disabled = false
 			imgAltEl.value = el.alt
 		},
 		disableInput (editorEl) {
-			const imgSrcEl = editorEl.querySelector("*[data-prop=\"img-src\"]")
-			imgSrcEl.disabled = true
-			imgSrcEl.value = ""
+			const imgFileEl = editorEl.querySelector(`*[data-prop="img-file"]`)
+			imgFileEl.disabled = true
 
-			const imgAltEl = editorEl.querySelector("*[data-prop=\"img-alt\"]")
+			const imgAltEl = editorEl.querySelector(`*[data-prop="img-alt"]`)
 			imgAltEl.disabled = true
 			imgAltEl.value = ""
 		},
 		setupInput (editorEl, contentEl) {
-			const imgSrcEl = editorEl.querySelector("*[data-prop=\"img-src\"]")
-			imgSrcEl.addEventListener("input", event => {
+			const imgFileEl = editorEl.querySelector(`*[data-prop="img-file"]`)
+			imgFileEl.addEventListener("input", event => {
 				// const imgEl = findRecursiveChild(blocks.img.checkFn, contentEl)
 				const imgEl = getSelected(contentEl)
-				if (imgEl) imgEl.src = imgSrcEl.value
+				if (!imgEl) return
+
+				const file = imgFileEl.files[0]
+
+				imgEl.src = URL.createObjectURL(file)
+				imgEl.dataset.editorLoading = true
+				uploadFile(file)
+					.then(url => {
+						imgEl.src = url
+						delete imgEl.dataset.editorError
+					})
+					.catch(err => {
+						// TODO: mostrar error
+						console.error(err)
+						imgEl.dataset.editorError = true
+					})
+					.finally(() => {
+						delete imgEl.dataset.editorLoading
+					})
 			}, false)
 
-			const imgAltEl = editorEl.querySelector("*[data-prop=\"img-alt\"]")
+			const imgAltEl = editorEl.querySelector(`*[data-prop="img-alt"]`)
 			imgAltEl.addEventListener("input", event => {
 				// const imgEl = findRecursiveChild(blocks.img.checkFn, contentEl)
 				const imgEl = getSelected(contentEl)
diff --git a/app/assets/stylesheets/editor.scss b/app/assets/stylesheets/editor.scss
index 27d0b8ca..1692237c 100644
--- a/app/assets/stylesheets/editor.scss
+++ b/app/assets/stylesheets/editor.scss
@@ -30,4 +30,11 @@
 		div[data-align="center"] { text-align: center; }
 		div[data-align="right"] { text-align: right; }
 	}
+
+	*[data-editor-loading] {
+		opacity: 0.5;
+	}
+	*[data-editor-error] {
+		filter: grayscale(100%);
+	}
 }
diff --git a/app/views/application/markdown.haml b/app/views/application/markdown.haml
index 3f499ea7..71a1336d 100644
--- a/app/views/application/markdown.haml
+++ b/app/views/application/markdown.haml
@@ -17,17 +17,21 @@
     %button{:data => {:button => "center"}} Center
     %button{:data => {:button => "right"}} Right
     %br/
+    // TODO: generar IDs para labels
+
     %label{:for => "mark-color"} Color de resaltado:
     %input{:type => "color", :data => {:prop => "mark-color"}}/
     %br/
-    %label{:for => "img-src"} URL de imágen:
-    %input{:placeholder => "https://radio.sutty.nl/public/placeholder_992x992.png", :type => "url", :data => {:prop => "img-src"}}/
+
+    %label{:for => "img-file"} Archivo de la imágen:
+    %input{:type => "file", :data => {:prop => "img-file"}}/
     %label{:for => "img-alt"} Descripción de imágen:
     %input{:placeholder => "Un álbum", :type => "text", :data => {:prop => "img-alt"}}/
     %button{:data => {:button => "img"}} Insertar imágen
     %br/
     %label{:for => "link-href"} URL de link:
     %input{:type => "url", :data => {:prop => "link-href"}}/
+
     .editor-content{:contenteditable => "true"}
       %h1
         Hola
diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index 05997ddc..ec2c50c1 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -14,7 +14,7 @@ Rails.application.config.content_security_policy do |policy|
   policy.script_src  :self
   policy.font_src    :self
   # XXX: Los íconos de Trix se cargan vía data:
-  policy.img_src     :self, :data, :https
+  policy.img_src     :self, :data, :https, :blob
   # Ya no usamos applets!
   policy.object_src  :none
   if Rails.env.development?