diff --git a/Gruntfile.coffee b/Gruntfile.coffee
index f11582ef9..43a8425db 100755
--- a/Gruntfile.coffee
+++ b/Gruntfile.coffee
@@ -61,6 +61,7 @@ module.exports = (grunt) ->
           'src/Filtering/**/*.coffee'
           'src/Quotelinks/**/*.coffee'
           'src/Posting/QR.coffee'
+          'src/Posting/Captcha.coffee'
           'src/Posting/**/*.coffee'
           'src/Images/**/*.coffee'
           'src/Linkification/**/*.coffee'
diff --git a/src/General/Config.coffee b/src/General/Config.coffee
index 36d913beb..ed0a784a1 100755
--- a/src/General/Config.coffee
+++ b/src/General/Config.coffee
@@ -371,6 +371,10 @@ Config =
         true
         'Show notifications on successful post creation or file uploading.'
       ]
+      'Use Recaptcha v1': [
+        false
+        'Use the old version of Recaptcha before the introduction of the checkbox.'
+      ]
       'Captcha Warning Notifications': [
         true
         'When disabled, shows a red border on the CAPTCHA input until a key is pressed instead of a notification.'
diff --git a/src/General/css/style.css b/src/General/css/style.css
index c0d90b3cd..792bd3a70 100755
--- a/src/General/css/style.css
+++ b/src/General/css/style.css
@@ -10,6 +10,7 @@
 #thread-watcher {
   box-shadow: -1px 2px 2px rgba(0, 0, 0, 0.25);
 }
+.captcha-img,
 .field {
   background-color: #FFF;
   border: 1px solid #CCC;
@@ -27,6 +28,7 @@
   font-size: 13px !important;
   opacity: 1.0 !important;
 }
+.captch-img:hover,
 .field:hover {
   border-color: #999;
 }
@@ -969,7 +971,8 @@ span.hide-announcement {
 #qr select,
 #dump-button,
 #url-button,
-.remove {
+.remove,
+.captcha-img {
   cursor: pointer;
 }
 #qr {
@@ -1062,6 +1065,23 @@ input.field.tripped:not(:hover):not(:focus) {
 #qr textarea {
   resize: both;
 }
+/* Recaptcha v1 */
+.captcha-img {
+  margin: 0px;
+  text-align: center;
+  background-image: #fff;
+  font-size: 0px;
+  min-height: 59px;
+  min-width: 302px;
+}
+.captcha-input{
+  width: 100%;
+  margin: 1px 0 0;
+}
+.captcha-input.error:focus {
+  border-color: rgb(255,0,0) !important;
+}
+/* Recaptcha v2 */
 #qr .captcha-root {
   position: relative;
 }
diff --git a/src/Posting/Captcha.coffee b/src/Posting/Captcha.coffee
new file mode 100644
index 000000000..5bcab40bb
--- /dev/null
+++ b/src/Posting/Captcha.coffee
@@ -0,0 +1 @@
+Captcha = {}
diff --git a/src/Posting/Captcha.v1.coffee b/src/Posting/Captcha.v1.coffee
new file mode 100644
index 000000000..fa9822543
--- /dev/null
+++ b/src/Posting/Captcha.v1.coffee
@@ -0,0 +1,176 @@
+Captcha.v1 =
+  init: ->
+    return if d.cookie.indexOf('pass_enabled=1') >= 0
+    return unless @isEnabled = !!$.id 'g-recaptcha'
+
+    script = $.el 'script',
+      src: '//www.google.com/recaptcha/api/js/recaptcha_ajax.js'
+    $.add d.head, script
+    captchaContainer = $.el 'div',
+      id: 'captchaContainer'
+      hidden: true
+    $.add d.body, captchaContainer
+
+    @setup() if Conf['Auto-load captcha']
+
+    imgContainer = $.el 'div',
+      className: 'captcha-img'
+      title: 'Reload reCAPTCHA'
+    $.extend imgContainer, <%= html('<img>') %>
+    input = $.el 'input',
+      className: 'captcha-input field'
+      title: 'Verification'
+      autocomplete: 'off'
+      spellcheck: false
+    @nodes =
+      img:       imgContainer.firstChild
+      input:     input
+
+    $.on input, 'blur',  QR.focusout
+    $.on input, 'focus', QR.focusin
+    $.on input, 'keydown', QR.captcha.keydown.bind QR.captcha
+    $.on @nodes.img.parentNode, 'click', QR.captcha.reload.bind QR.captcha
+
+    $.addClass QR.nodes.el, 'has-captcha'
+    $.after QR.nodes.com.parentNode, [imgContainer, input]
+
+    @captchas = []
+    $.get 'captchas', [], ({captchas}) ->
+      QR.captcha.sync captchas
+      QR.captcha.clear()
+    $.sync 'captchas', @sync
+
+    new MutationObserver(@afterSetup).observe $.id('captchaContainer'), childList: true
+
+    @beforeSetup()
+    @afterSetup() # reCAPTCHA might have loaded before the QR.
+  beforeSetup: ->
+    {img, input} = @nodes
+    img.parentNode.hidden = true
+    input.value = ''
+    input.placeholder = 'Focus to load reCAPTCHA'
+    @count()
+    $.on input, 'focus', @setup
+  setup: ->
+    $.globalEval '''
+      (function() {
+        var captchaContainer = document.getElementById("captchaContainer");
+        if (captchaContainer.firstChild) return;
+        function setup() {
+          if (window.Recaptcha) {
+            Recaptcha.create(recaptchaKey, captchaContainer, {theme: "clean"});
+          } else {
+            setTimeout(setup, 25);
+          }
+        }
+        setup();
+      })()
+    '''
+  afterSetup: ->
+    return unless challenge = $.id 'recaptcha_challenge_field_holder'
+    return if challenge is QR.captcha.nodes.challenge
+
+    setLifetime = (e) -> QR.captcha.lifetime = e.detail
+    $.on window, 'captcha:timeout', setLifetime
+    $.globalEval 'window.dispatchEvent(new CustomEvent("captcha:timeout", {detail: RecaptchaState.timeout}))'
+    $.off window, 'captcha:timeout', setLifetime
+
+    {img, input} = QR.captcha.nodes
+    img.parentNode.hidden = false
+    input.placeholder = 'Verification'
+    QR.captcha.count()
+    $.off input, 'focus', QR.captcha.setup
+
+    QR.captcha.nodes.challenge = challenge
+    new MutationObserver(QR.captcha.load.bind QR.captcha).observe challenge,
+      childList: true
+      subtree: true
+      attributes: true
+    QR.captcha.load()
+
+    if QR.nodes.el.getBoundingClientRect().bottom > doc.clientHeight
+      QR.nodes.el.style.top    = null
+      QR.nodes.el.style.bottom = '0px'
+  destroy: ->
+    $.globalEval 'Recaptcha.destroy()'
+    @beforeSetup()
+
+  sync: (captchas) ->
+    QR.captcha.captchas = captchas
+    QR.captcha.count()
+
+  getOne: ->
+    @clear()
+    if captcha = @captchas.shift()
+      {challenge, response} = captcha
+      @count()
+      $.set 'captchas', @captchas
+    else
+      challenge   = @nodes.img.alt
+      if response = @nodes.input.value
+        if Conf['Auto-load captcha'] then @reload() else @destroy()
+    # Duplicate one-word captchas.
+    # Don't duplicate street numbers for now (needs testing).
+    if response and !/\s|^\d$/.test response
+      response = "#{response} #{response}"
+    {challenge, response}
+
+  save: ->
+    return unless /\S/.test(response = @nodes.input.value)
+    @nodes.input.value = ''
+    @captchas.push
+      challenge: @nodes.img.alt
+      response:  response
+      timeout:   @timeout
+    @count()
+    @reload()
+    $.set 'captchas', @captchas
+
+  clear: ->
+    return unless @captchas.length
+    now = Date.now()
+    for captcha, i in @captchas
+      break if captcha.timeout > now
+    return unless i
+    @captchas = @captchas[i..]
+    @count()
+    $.set 'captchas', @captchas
+
+  load: ->
+    return unless @nodes.challenge.firstChild
+    return unless challenge_image = $.id 'recaptcha_challenge_image'
+    # -1 minute to give upload some time.
+    @timeout  = Date.now() + @lifetime * $.SECOND - $.MINUTE
+    challenge = @nodes.challenge.firstChild.value
+    @nodes.img.alt = challenge
+    @nodes.img.src = challenge_image.src
+    @nodes.input.value = null
+    @clear()
+
+  count: ->
+    count = if @captchas then @captchas.length else 0
+    placeholder = @nodes.input.placeholder.replace /\ \(.*\)$/, ''
+    placeholder += switch count
+      when 0
+        if placeholder is 'Verification' then ' (Shift + Enter to cache)' else ''
+      when 1
+        ' (1 cached captcha)'
+      else
+        " (#{count} cached captchas)"
+    @nodes.input.placeholder = placeholder
+    @nodes.input.alt = count # For XTRM RICE.
+
+  reload: (focus) ->
+    # Hack to prevent the input from being focused
+    $.globalEval 'Recaptcha.reload(); Recaptcha.should_focus = false;'
+    # Focus if we meant to.
+    @nodes.input.focus() if focus
+
+  keydown: (e) ->
+    if e.keyCode is 8 and not @nodes.input.value
+      @reload()
+    else if e.keyCode is 13 and e.shiftKey
+      @save()
+    else
+      return
+    e.preventDefault()
diff --git a/src/Posting/QR.captcha.coffee b/src/Posting/Captcha.v2.coffee
similarity index 98%
rename from src/Posting/QR.captcha.coffee
rename to src/Posting/Captcha.v2.coffee
index 4135efc26..a66cccd14 100644
--- a/src/Posting/QR.captcha.coffee
+++ b/src/Posting/Captcha.v2.coffee
@@ -1,4 +1,4 @@
-QR.captcha =
+Captcha.v2 =
   init: ->
     return if d.cookie.indexOf('pass_enabled=1') >= 0
     return unless @isEnabled = !!$.id 'g-recaptcha'
@@ -117,9 +117,9 @@ QR.captcha =
     if captcha = @captchas.shift()
       @count()
       $.set 'captchas', @captchas
-      captcha.response
+      {response: captcha.response}
     else
-      null
+      {}
 
   save: (pasted) ->
     reload = QR.cooldown.auto and @needed()
diff --git a/src/Posting/QR.coffee b/src/Posting/QR.coffee
index 88cf9865e..efdfaa3d1 100644
--- a/src/Posting/QR.coffee
+++ b/src/Posting/QR.coffee
@@ -7,6 +7,8 @@ QR =
     @db = new DataBoard 'yourPosts'
     @posts = []
 
+    @captcha = Captcha[if Conf['Use Recaptcha v1'] then 'v1' else 'v2']
+
     if Conf['QR Shortcut']
       sc = $.el 'a',
         className: "qr-shortcut fa fa-comment-o #{unless Conf['Persistent QR'] then 'disabled' else ''}"
@@ -95,7 +97,7 @@ QR =
     if QR.nodes
       QR.nodes.el.hidden = false
       QR.unhide()
-      QR.captcha.setup()
+      QR.captcha.setup() unless Conf['Use Recaptcha v1']
       return
     try
       QR.dialog()
@@ -112,6 +114,8 @@ QR =
     QR.cleanNotifications()
     d.activeElement.blur()
     $.rmClass QR.nodes.el, 'dump'
+    if Conf['Use Recaptcha v1'] and !Conf['Captcha Warning Notifications']
+      $.rmClass QR.captcha.nodes.input, 'error' if QR.captcha.isEnabled
     if Conf['QR Shortcut']
       $.toggleClass $('.qr-shortcut'), 'disabled'
     new QR.post true
@@ -119,7 +123,8 @@ QR =
       post.delete()
     QR.cooldown.auto = false
     QR.status()
-    QR.captcha.destroy()
+    if !Conf['Use Recaptcha v1'] or (QR.captcha.isEnabled and not Conf['Auto-load captcha'])
+      QR.captcha.destroy()
   focusin: ->
     $.addClass QR.nodes.el, 'focus'
   focusout: ->
@@ -144,9 +149,21 @@ QR =
     else
       el = err
       el.removeAttribute 'style'
-    if QR.captcha.isEnabled and /captcha|verification/i.test el.textContent
-      QR.captcha.setup true
-    QR.notify el
+    captchaErr = QR.captcha.isEnabled and /captcha|verification/i.test el.textContent
+    if captchaErr and Conf['Use Recaptcha v1']
+      if QR.captcha.captchas.length is 0
+        # Focus the captcha input on captcha error.
+        QR.captcha.nodes.input.focus()
+        QR.captcha.setup()
+      if Conf['Captcha Warning Notifications'] and !d.hidden
+        QR.notify el
+      else
+        $.addClass QR.captcha.nodes.input, 'error'
+        $.on QR.captcha.nodes.input, 'keydown', ->
+          $.rmClass QR.captcha.nodes.input, 'error'
+    else
+      QR.captcha.setup true if captchaErr and !Conf['Use Recaptcha v1']
+      QR.notify el
     alert el.textContent if d.hidden
 
   notify: (el) ->
@@ -549,7 +566,7 @@ QR =
     QR.cooldown.init()
     QR.captcha.init()
     $.add d.body, dialog
-    QR.captcha.setup()
+    QR.captcha.setup() unless Conf['Use Recaptcha v1']
 
     # Create a custom event when the QR dialog is first initialized.
     # Use it to extend the QR's functionalities, or for XTRM RICE.
@@ -640,7 +657,7 @@ QR =
       err = 'Max limit of image replies has been reached.'
 
     if QR.captcha.isEnabled and !err
-      response = QR.captcha.getOne()
+      {challenge, response} = QR.captcha.getOne()
       err = 'No valid captcha.' unless response
 
     QR.cleanNotifications()
@@ -674,6 +691,7 @@ QR =
       textonly: textOnly
       mode:     'regist'
       pwd:      QR.persona.pwd
+      recaptcha_challenge_field: challenge
       'g-recaptcha-response': response
 
     options =
@@ -803,6 +821,7 @@ QR =
         icon: Favicon.logo
       notif.onclick = ->
         QR.open()
+        QR.captcha.nodes.input.focus() if Conf['Use Recaptcha v1']
         window.focus()
       notif.onshow = ->
         setTimeout ->
@@ -812,8 +831,10 @@ QR =
     unless Conf['Persistent QR'] or postsCount
       QR.close()
     else
+      if Conf['Use Recaptcha v1'] and QR.posts.length > 1 and QR.captcha.isEnabled and QR.captcha.captchas.length is 0
+        QR.captcha.setup()
       post.rm()
-      QR.captcha.setup true
+      QR.captcha.setup true unless Conf['Use Recaptcha v1']
 
     QR.cooldown.add req.uploadEndTime, threadID, postID
 
diff --git a/src/Posting/QR.post.coffee b/src/Posting/QR.post.coffee
index ef7a4da22..91c7dc115 100644
--- a/src/Posting/QR.post.coffee
+++ b/src/Posting/QR.post.coffee
@@ -70,7 +70,7 @@ QR.post = class
     @select() if select
     @unlock()
     # Post count temporarily off by 1 when called from QR.post.rm
-    $.queueTask -> QR.captcha.setup()
+    $.queueTask -> QR.captcha.setup() unless Conf['Use Recaptcha v1']
 
   rm: ->
     @delete()
@@ -133,7 +133,7 @@ QR.post = class
         QR.status()
       when 'com'
         @nodes.span.textContent = @com
-        QR.captcha.onPostChange()
+        QR.captcha.onPostChange() unless Conf['Use Recaptcha v1']
         QR.characterCount()
         # Disable auto-posting if you're typing in the first post
         # during the last 5 seconds of the cooldown.
@@ -162,7 +162,7 @@ QR.post = class
     @filename = file.name
     @filesize = $.bytesToString file.size
     @nodes.label.hidden = false if QR.spoiler
-    QR.captcha.onPostChange()
+    QR.captcha.onPostChange() unless Conf['Use Recaptcha v1']
     URL.revokeObjectURL @URL
     if @ is QR.selected
       @showFileData()