diff --git a/4chan_x.user.js b/4chan_x.user.js
index a80aa0d9b..839c523c4 100644
--- a/4chan_x.user.js
+++ b/4chan_x.user.js
@@ -1231,6 +1231,16 @@
       $.bind(window, 'message', qr.message);
       $.bind($('#recaptcha_challenge_field_holder'), 'DOMNodeInserted', qr.captchaNode);
       qr.captchaTime = Date.now();
+      qr.acceptFiles = $('.rules').textContent.match(/:(.+)/)[1].replace(/[A-Z]{3}/g, function(type) {
+        switch (type) {
+          case 'JPG':
+            return 'image/JPEG';
+          case 'PDF':
+            return 'application/' + type;
+          default:
+            return 'image/' + type;
+        }
+      });
       iframe = $.el('iframe', {
         name: 'iframe',
         hidden: true
@@ -1241,7 +1251,7 @@
     attach: function() {
       var fileDiv;
       fileDiv = $.el('div', {
-        innerHTML: '<input type=file name=upfile><a>X</a>'
+        innerHTML: "<input type=file name=upfile accept='" + qr.acceptFiles + "'><a>X</a>"
       });
       $.bind(fileDiv.firstChild, 'change', qr.validateFileSize);
       $.bind(fileDiv.lastChild, 'click', (function() {
@@ -1304,7 +1314,7 @@
       THREAD_ID = g.THREAD_ID || $.x('ancestor::div[@class="thread"]/div', link).id;
       spoiler = $('.postarea label') ? '<label> [<input type=checkbox name=spoiler>Spoiler Image?]</label>' : '';
       qr.challenge = $('#recaptcha_challenge_field').value;
-      html = "      <a id=close title=close>X</a>      <input type=checkbox id=autohide title=autohide>      <div class=move>        <input class=inputtext type=text name=name value='" + name + "' placeholder=Name form=qr_form>        Quick Reply      </div>      <div class=autohide>        <form name=post action=http://sys.4chan.org/" + g.BOARD + "/post method=POST enctype=multipart/form-data target=iframe id=qr_form>          <input type=hidden name=resto value=" + THREAD_ID + ">          <input type=hidden name=recaptcha_challenge_field id=recaptcha_challenge_field>          <input type=hidden name=mode value=regist>          <div><input class=inputtext type=text name=email value='" + email + "' placeholder=E-mail>" + spoiler + "</div>          <div><input class=inputtext type=text name=sub placeholder=Subject><input type=submit value=" + submitValue + " id=com_submit " + submitDisabled + "><label><input type=checkbox id=auto>auto</label></div>          <div><textarea class=inputtext name=com placeholder=Comment></textarea></div>          <div><img src=http://www.google.com/recaptcha/api/image?c=" + qr.challenge + "></div>          <div><input class=inputtext type=text autocomplete=off placeholder=Verification id=dummy><input type=hidden name=recaptcha_response_field id=recaptcha_response_field><span id=captchas>" + ($.get('captchas', []).length) + " captchas</span></div>          <div><input type=file name=upfile></div>        </form>        <div id=files></div>        <div><input class=inputtext type=password name=pwd value='" + pwd + "' placeholder=Password form=qr_form maxlength=8><a id=attach>attach another file</a></div>      </div>      <a id=error class=error></a>      ";
+      html = "      <a id=close title=close>X</a>      <input type=checkbox id=autohide title=autohide>      <div class=move>        <input class=inputtext type=text name=name value='" + name + "' placeholder=Name form=qr_form>        Quick Reply      </div>      <div class=autohide>        <form name=post action=http://sys.4chan.org/" + g.BOARD + "/post method=POST enctype=multipart/form-data target=iframe id=qr_form>          <input type=hidden name=resto value=" + THREAD_ID + ">          <input type=hidden name=recaptcha_challenge_field id=recaptcha_challenge_field>          <input type=hidden name=mode value=regist>          <div><input class=inputtext type=text name=email value='" + email + "' placeholder=E-mail>" + spoiler + "</div>          <div><input class=inputtext type=text name=sub placeholder=Subject><input type=submit value=" + submitValue + " id=com_submit " + submitDisabled + "><label><input type=checkbox id=auto>auto</label></div>          <div><textarea class=inputtext name=com placeholder=Comment></textarea></div>          <div><img src=http://www.google.com/recaptcha/api/image?c=" + qr.challenge + "></div>          <div><input class=inputtext type=text autocomplete=off placeholder=Verification id=dummy><input type=hidden name=recaptcha_response_field id=recaptcha_response_field><span id=captchas>" + ($.get('captchas', []).length) + " captchas</span></div>          <div><input type=file name=upfile accept='" + qr.acceptFiles + "'></div>        </form>        <div id=files></div>        <div><input class=inputtext type=password name=pwd value='" + pwd + "' placeholder=Password form=qr_form maxlength=8><a id=attach>attach another file</a></div>      </div>      <a id=error class=error></a>      ";
       qr.el = ui.dialog('qr', {
         top: '0px',
         left: '0px'
@@ -1428,7 +1438,8 @@
       oldFile = $('[type=file]', qr.el);
       newFile = $.el('input', {
         type: 'file',
-        name: 'upfile'
+        name: 'upfile',
+        accept: qr.acceptFiles
       });
       return $.replace(oldFile, newFile);
     },
@@ -1526,7 +1537,8 @@
       }
       file = $.el('input', {
         type: 'file',
-        name: 'upfile'
+        name: 'upfile',
+        accept: qr.acceptFiles
       });
       $.bind(file, 'change', qr.validateFileSize);
       $.replace(this, file);
diff --git a/changelog b/changelog
index be3f03858..2f2709020 100644
--- a/changelog
+++ b/changelog
@@ -2,6 +2,7 @@ GitHub
 - mayhem:
   bring back auto posting
   don't start the cooldown on thread creation
+  limit the file upload dialog to the accepted file types (qr)
 - aeosynth:
   show linebreaks as spaces in title & watcher
   auto posting fixes
diff --git a/script.coffee b/script.coffee
index 90b0c93af..26c6682f9 100644
--- a/script.coffee
+++ b/script.coffee
@@ -975,6 +975,15 @@ qr =
     $.bind $('#recaptcha_challenge_field_holder'), 'DOMNodeInserted', qr.captchaNode
     qr.captchaTime = Date.now()
 
+    qr.acceptFiles = $('.rules').textContent.match(/:(.+)/)[1].replace /[A-Z]{3}/g, (type) ->
+      switch type
+        when 'JPG'
+          'image/JPEG'
+        when 'PDF'
+          'application/' + type
+        else
+          'image/' + type
+
     iframe = $.el 'iframe',
       name: 'iframe'
       hidden: true
@@ -984,7 +993,7 @@ qr =
     $('#recaptcha_response_field').id = ''
 
   attach: ->
-    fileDiv = $.el 'div', innerHTML: '<input type=file name=upfile><a>X</a>'
+    fileDiv = $.el 'div', innerHTML: "<input type=file name=upfile accept='#{qr.acceptFiles}'><a>X</a>"
     $.bind fileDiv.firstChild, 'change', qr.validateFileSize
     $.bind fileDiv.lastChild, 'click', (-> $.rm @parentNode)
     $.append $('#files', qr.el), fileDiv
@@ -1055,7 +1064,7 @@ qr =
           <div><textarea class=inputtext name=com placeholder=Comment></textarea></div>
           <div><img src=http://www.google.com/recaptcha/api/image?c=#{qr.challenge}></div>
           <div><input class=inputtext type=text autocomplete=off placeholder=Verification id=dummy><input type=hidden name=recaptcha_response_field id=recaptcha_response_field><span id=captchas>#{$.get('captchas', []).length} captchas</span></div>
-          <div><input type=file name=upfile></div>
+          <div><input type=file name=upfile accept='#{qr.acceptFiles}'></div>
         </form>
         <div id=files></div>
         <div><input class=inputtext type=password name=pwd value='#{pwd}' placeholder=Password form=qr_form maxlength=8><a id=attach>attach another file</a></div>
@@ -1169,7 +1178,7 @@ qr =
     $('[name=recaptcha_response_field]', qr.el).value = ''
     # XXX opera doesn't allow resetting file inputs w/ file.value = ''
     oldFile = $ '[type=file]', qr.el
-    newFile = $.el 'input', type: 'file', name: 'upfile'
+    newFile = $.el 'input', type: 'file', name: 'upfile', accept: qr.acceptFiles
     $.replace oldFile, newFile
 
   submit: (e) ->
@@ -1247,7 +1256,7 @@ qr =
   validateFileSize: (e) ->
     return unless @files[0].size > $('input[name=MAX_FILE_SIZE]').value
 
-    file = $.el 'input', type: 'file', name: 'upfile'
+    file = $.el 'input', type: 'file', name: 'upfile', accept: qr.acceptFiles
     $.bind file, 'change', qr.validateFileSize
     $.replace @, file