Cloudinary Blog

Delivering all your websites’ images through a CDN

by Tal Lev-Ami
Delivering all your website images through a CDN
If you take a look at the top 100 blogs you will notice that almost all of them deliver their assets (images, JS, CSS, etc.) through state-of-the-art CDNs and utilize online resizing technologies. With faster, off-site access, they greatly improve their users’ browsing experience, while reducing load on their servers.
 
Using Cloudinary you can use these same technologies today, in your website or blog, without any hassle. Simply direct all your images to Cloudinary and they would be delivered to your visitors through Amazon’s powerful CDN network. You can even add alternative dimensions to your images’ URL and get your pictures in any desired size or perspective. All of this with minimum changes on your side.
 
UPDATE - March 2013: All images are delivered via the leading worldwide CDN of Akamai. 
 
How it’s done? Simply prefix all your images with:
 
http://res.cloudinary.com/<your cloudinary cloud name>/image/fetch/

 
Here's a quick example:
Jennifer Lawrence

Both URLs return the exact same image, only the second one is cached and delivered through fast, localized CDNs and not via your local web server. Better experience to your users. Lower load on your server. Lower hosting costs.
 
Note: that 'demo' in all the URLs should be replaced with your Cloudinary’s cloud name. Click here to set up one in seconds.
 
You can use this method to create different sized thumbnails for the same photo. For example, creating a 150x150 crop focused on Jennifer’s face ('g_face') and with rounded corners of 20 pixels ('r_20') generates the following beautiful image:
 

150x150 Jennifer Lawrence
 
Nice, isn’t it :) see our docs of image transformations for plenty more options.
 
If you are a developer, you can do the same from code. For example, in Ruby on Rails:
 
cl_image_tag("http://upload.wikimedia.org/wikipedia/commons/4/46/" +
                       "Jennifer_Lawrence_at_the_83rd_Academy_Awards.jpg",
                       :type => :fetch, :width => 150, :height => 150,
                       :crop => :thumb, :gravity => :face, :radius => 20)
 
Note that if the image behind the original URL changes, Cloudinary will automatically update the images embedded in your site and all its resized versions.
 
To summarize, any blogger and any website owner can now deliver its website’s images through a CDN and seamlessly create smartly resized and cropped images in any dimension. All that by just adding the Cloudinary resource URL as a prefix to all images.
blog comments powered by Disqus

Recent Blog Posts

How Answers.com manage millions of images

by Orly Bogler
How Answers.com utilizes Cloudinary to manage millions of images

When was the last time you've asked Google about your favorite band, movie star, or personal hobby? I can only assume that one of the first results that came up was from Answers.com. Nearly everyone knows this website, which is on the Quantcast Top 10 most visited sites in the world.

Read more
Control the zoom level with automatic image cropping

Many websites now offer their users the ability to upload images and profile pictures, making it a challenge for web designers to maintain a certain graphic design and style when subsequently displaying these images. The profile pictures may need to be smartly cropped to focus on the faces, with some sites that prefer close-ups of faces and others that prefer including more background when displaying images of people.

Read more
Introducing cloud based service for video management

They say that a picture is worth a thousand words. For modern websites, a video surely takes the visual impact to a whole new level.

Nowadays, people enjoy the amazing capability of shooting videos with smartphone cameras that easily fit in their back pockets and are accessible nearly everywhere. Modern web applications have an opportunity to dramatically increase their visual impact by showcasing these videos online. Between news reports, user shared video snippets, explainer videos and ad campaigns, we see more and more videos appearing daily in our visited websites.

Read more
Automatic and accurate red eye removal with Cloudinary

Red eye often happens due to the use of flash in low light conditions as the light hits the eye very quickly and into the retina. It then bounces off of the back of the eye and emits a red color due to the blood vessels there. Although more professional modern cameras and flashes generally prevent this from happening, red eye may still occur with simpler, smaller cameras (including smartphones). There are various software solutions for red eye removal available on mobile devices and desktops, some of which require manual processing to get good results.

Read more
How to detect and prevent malware infected user uploads

Social networking sites allow users to upload images or other types of files that are immediately available to other users via news feeds or notifications. In some cases, attackers can directly spread infected files, but more commonly, they leverage the viral effect and the fact that users are simply unaware that their files are infected through sharing and collaborating with others. As a site owner or application developer, it is your responsibility to protect users and prevent these situations from occurring. Fortunately, Cloudinary makes this easier with its Metascan add-on.

Read more