diff --git a/app/assets/stylesheets/mobile.css.scss b/app/assets/stylesheets/mobile.css.scss
new file mode 100644
index 000000000..2f362cdd4
--- /dev/null
+++ b/app/assets/stylesheets/mobile.css.scss
@@ -0,0 +1,62 @@
+/*
+ *= require "./common/010_reset"
+ *= require "./common/020_base"
+ *= require "./common/030_links"
+*/
+
+body {
+  padding: 5px;
+}
+
+/* paginator */
+div.paginator {
+  font-size: 20pt;
+  font-weight: bold;
+  text-align: center;
+
+  li {
+    display: inline;
+
+    a, span {
+      border: 1px solid #EAEAEA;
+      padding: 3px 18px;
+      margin: 0 3px;
+      display: inline-block;
+    }
+  }
+}
+
+/* posts/index */
+article.post-preview {
+  margin: 15px 0;
+  width: 150px;
+  text-align: center;
+  vertical-align: middle;
+  display: inline-block;
+  a {
+    width: 150px;
+    display: block;
+    margin: 0 auto;
+  }
+  img {
+    margin: 0 auto;
+  }
+}
+
+/* posts/show */
+img#image {
+  margin-top: 5px;
+}
+
+div#tags {
+  margin-top: 10px;
+
+  li {
+    margin: 10px 0;
+  }
+
+  a.search-tag {
+    font-size: 24pt;
+    font-weight: bold;
+  }
+}
diff --git a/app/controllers/mobile/posts_controller.rb b/app/controllers/mobile/posts_controller.rb
new file mode 100644
index 000000000..bd733d451
--- /dev/null
+++ b/app/controllers/mobile/posts_controller.rb
@@ -0,0 +1,18 @@
+class Mobile::PostsController < ApplicationController
+  layout "mobile"
+  before_filter :set_mobile_mode
+  
+  def index
+    @post_set = PostSets::Post.new(params[:tags], params[:page], CurrentUser.user.per_page, false)
+    @posts = @post_set.posts
+  end
+
+  def show
+    @post = Post.find(params[:id])
+  end
+
+private
+  def set_mobile_mode
+    CurrentUser.mobile_mode = true
+  end
+end
diff --git a/app/logical/current_user.rb b/app/logical/current_user.rb
index c68630175..d40fe4ee5 100644
--- a/app/logical/current_user.rb
+++ b/app/logical/current_user.rb
@@ -11,6 +11,7 @@ class CurrentUser
     ensure
       self.user = old_user
       self.ip_addr = old_ip_addr
+      self.mobile_mode = false
     end
   end
 
@@ -30,6 +31,14 @@ class CurrentUser
     Thread.current[:current_ip_addr]
   end
 
+  def self.mobile_mode=(mode)
+    Thread.current[:mobile_mode] = mode
+  end
+
+  def self.mobile_mode?
+    Thread.current[:mobile_mode]
+  end
+
   def self.id
     if user.nil?
       nil
diff --git a/app/models/post.rb b/app/models/post.rb
index 8c83d6517..a30f1a992 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -118,6 +118,10 @@ class Post < ActiveRecord::Base
     end
 
     def file_url_for(user)
+      if CurrentUser.mobile_mode?
+        return large_file_url
+      end
+
       case user.default_image_size
       when "large"
         if image_width > Danbooru.config.large_image_width
@@ -132,6 +136,10 @@ class Post < ActiveRecord::Base
     end
 
     def file_path_for(user)
+      if CurrentUser.mobile_mode?
+        return large_file_path
+      end
+      
       case user.default_image_size
       when "large"
         if image_width > Danbooru.config.large_image_width
@@ -155,6 +163,14 @@ class Post < ActiveRecord::Base
   end
 
   module ImageMethods
+    def device_scale
+      if large_image_width > 320
+        320.0 / (large_image_width + 10)
+      else
+        1.0
+      end
+    end
+
     def twitter_card_supported?
       image_width.to_i >= 280 && image_height.to_i >= 150
     end
@@ -181,6 +197,10 @@ class Post < ActiveRecord::Base
     end
 
     def image_width_for(user)
+      if CurrentUser.mobile_mode?
+        return large_image_width
+      end
+
       case user.default_image_size
       when "large"
         large_image_width
@@ -191,6 +211,10 @@ class Post < ActiveRecord::Base
     end
 
     def image_height_for(user)
+      if CurrentUser.mobile_mode?
+        return large_image_height
+      end
+
       case user.default_image_size
       when "large"
         large_image_height
diff --git a/app/presenters/post_presenter.rb b/app/presenters/post_presenter.rb
index bb7be1799..813f287bb 100644
--- a/app/presenters/post_presenter.rb
+++ b/app/presenters/post_presenter.rb
@@ -20,7 +20,11 @@ class PostPresenter < Presenter
     else
       tag_param = nil
     end
-    html << %{<a href="#{path}/#{post.id}#{tag_param}">}
+    if options[:mobile]
+      html << %{<a href="/m#{path}/#{post.id}#{tag_param}">}
+    else
+      html << %{<a href="#{path}/#{post.id}#{tag_param}">}
+    end
     html << %{<img src="#{post.preview_file_url}" alt="#{h(post.tag_string)}">}
     html << %{</a>}
     html << %{</article>}
diff --git a/app/presenters/post_set_presenters/base.rb b/app/presenters/post_set_presenters/base.rb
index c06c1d69c..f13ce0245 100644
--- a/app/presenters/post_set_presenters/base.rb
+++ b/app/presenters/post_set_presenters/base.rb
@@ -4,7 +4,7 @@ module PostSetPresenters
       raise NotImplementedError
     end
 
-    def post_previews_html(template)
+    def post_previews_html(template, options = {})
       html = ""
 
       if posts.empty?
@@ -12,7 +12,7 @@ module PostSetPresenters
       end
 
       posts.each do |post|
-        html << PostPresenter.preview(post, :tags => @post_set.tag_string, :raw => @post_set.raw)
+        html << PostPresenter.preview(post, :tags => @post_set.tag_string, :raw => @post_set.raw, :mobile => options[:mobile])
         html << "\n"
       end
 
diff --git a/app/presenters/post_set_presenters/post.rb b/app/presenters/post_set_presenters/post.rb
index 290f77c43..2fea5d315 100644
--- a/app/presenters/post_set_presenters/post.rb
+++ b/app/presenters/post_set_presenters/post.rb
@@ -48,8 +48,8 @@ module PostSetPresenters
       RelatedTagCalculator.calculate_from_post_set_to_array(post_set).map(&:first)
     end
 
-    def tag_list_html(template)
-      tag_set_presenter.tag_list_html(template)
+    def tag_list_html(template, options = {})
+      tag_set_presenter.tag_list_html(template, options)
     end
   end
 end
diff --git a/app/views/layouts/mobile.html.erb b/app/views/layouts/mobile.html.erb
new file mode 100644
index 000000000..768a5485c
--- /dev/null
+++ b/app/views/layouts/mobile.html.erb
@@ -0,0 +1,20 @@
+<!doctype html>
+<html>
+<head>
+  <title><%= yield :page_title %></title>
+  <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
+  <%= csrf_meta_tag %>
+  <%= stylesheet_link_tag "mobile", :media => "screen" %>
+  <%= javascript_include_tag "mobile" %>
+  <%= Danbooru.config.custom_html_header_content %>
+  <%= yield :html_header %>
+</head>
+<body lang="en">
+  <header id="top">
+    <h1><%= link_to Danbooru.config.app_name, "/" %></h1>
+  </header>
+  <div id="page">
+    <%= yield :layout %>
+  </div>
+</body>
+</html>
diff --git a/app/views/mobile/posts/index.html.erb b/app/views/mobile/posts/index.html.erb
new file mode 100644
index 000000000..88d83f84c
--- /dev/null
+++ b/app/views/mobile/posts/index.html.erb
@@ -0,0 +1,16 @@
+<%= form_tag(m_posts_path, :method => "get") do %>
+  <%= text_field_tag("tags", params[:tags], :size => 30) %>
+  <%= submit_tag "Go", :name => nil %>
+<% end %>
+
+<%= @post_set.presenter.post_previews_html(self, :mobile => true) %>
+
+<%= numbered_paginator(@post_set.posts) %>
+
+<div id="tags">
+  <%= @post_set.presenter.tag_list_html(self, :name_only => true, :path_prefix => "/m/posts") %>
+</div>
+
+<%= content_for(:html_header) do %>
+  <meta name="viewport" content="width=device-width,initial-scale=1">
+<% end %>
diff --git a/app/views/mobile/posts/show.html.erb b/app/views/mobile/posts/show.html.erb
new file mode 100644
index 000000000..5654899a2
--- /dev/null
+++ b/app/views/mobile/posts/show.html.erb
@@ -0,0 +1,14 @@
+<%= form_tag(m_posts_path, :method => "get") do %>
+  <%= text_field_tag("tags", params[:tags], :size => 20) %>
+  <%= submit_tag "Go", :name => nil %>
+<% end %>
+
+<%= @post.presenter.image_html(self) %>
+
+<div id="tags">
+  <%= @post.presenter.tag_list_html(self, :name_only => true, :path_prefix => "/m/posts") %>
+</div>
+
+<%= content_for(:html_header) do %>
+  <meta name="viewport" content="width=device-width,initial-scale=<%= @post.device_scale %>">
+<% end %>
diff --git a/config/routes.rb b/config/routes.rb
index 2cc61b2be..c514b7320 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -3,6 +3,9 @@ Danbooru::Application.routes.draw do
     resources :users, :only => [:edit, :update]
     resource  :alias_and_implication_import, :only => [:new, :create]
   end
+  namespace :mobile do
+    resources :posts, :only => [:index, :show]
+  end
   namespace :moderator do
     resource :dashboard, :only => [:show]
     resources :ip_addrs, :only => [:index] do
@@ -257,6 +260,8 @@ Danbooru::Application.routes.draw do
   resources :wpages, :controller => "wiki_pages"
   resources :ftopics, :controller => "forum_topics"
   resources :fposts, :controller => "forum_posts"
+  match "/m/posts", :controller => "mobile/posts", :action => "index"
+  match "/m/posts/:id", :controller => "mobile/posts", :action => "show"
 
   # legacy aliases
   match "/artist" => redirect {|params, req| "/artists?page=#{req.params[:page]}&search[name]=#{CGI::escape(req.params[:name].to_s)}"}