Hello!! Dragonfly is a highly customizable ruby gem for handling images and other attachments and is already in use on thousands of websites.

If you want to generate image thumbnails in Rails ... ruby class User < ActiveRecord::Base # model dragonfly_accessor :photo end erb <%= image_tag @user.photo.thumb('300x200#') # view %>

... or generate text images on-demand in Sinatra ... ruby get "/:text" do |text| Dragonfly.app.generate(:text, text, "font-size" => 32).to_response(env) end

... or just generally manage attachments in your web app ... ```ruby wav = Dragonfly.app.fetch_url("http://free.music/lard.wav") # GET from t'interwebs mp3 = wav.to_mp3 # to_mp3 is a custom processor uid = mp3.store # store in the configured datastore, e.g. S3

url = Dragonfly.app.remote_url_for(uid) # ===> http://s3.amazon.com/my-stuff/lard.mp3 ```

... then Dragonfly is for you! See the documentation to get started!



RDoc documentation is here

Upgrading from v0.9 to v1.0

Dragonfly has changed somewhat since version 0.9. See the Upgrading wiki for notes on changes, and feel free to add anything you come across while upgrading!

Changes are listed in History.md

If for whatever reason you can't upgrade, then the docs for version 0.9.x are here.


gem install dragonfly

or in your Gemfile ruby gem 'dragonfly', '~> 1.0.7'

Require with ruby require 'dragonfly'

Ruby Versions

Dragonfly has been tested with ruby versions 1.8.7, 1.9.2, 1.9.3, 2.0.0, jruby 1.7.8 and rubinius 2.2.

Plugins / add-ons

See the Add-ons wiki.

Please feel free to contribute!!


Please use the github issue tracker if you have any issues.


Google group dragonfly-users


Mark Evans (author) with awesome contributions from these guys