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.

Recent Blog Posts

Optimizing web performance and your bottom line

by Robert Moseley
Optimize your website and app for maximum user engagement
Patience is not a virtue for website visitors and online shoppers. Every fraction of a second counts when it comes to keeping – or losing – a visitor to your website.  
 
Loading time is a major contributing factor to page abandonment, according to an infographic on the Kissmetrics blog using statistics from Akamai and Gomez. Because the average web visitor has no patience for a page that takes too long to load, abandonment increases as a percentage with every second of load time. Nearly 40 percent of users will abandon a page after 10 seconds, the blog noted. Mobile Internet users probably experience the most frustration with this issue –  73 percent noted that they’ve encountered a website that was too slow to load. 
Read more
Is your website offering the best user experience?
 
The most common frustrations voiced by people when visiting a website are the time it takes for pages to load and the amount of bandwidth some sites eat from their monthly mobile plans. 
 
What these users might not realize is that, in many cases, the culprit is the same: website image performance. Ensuring images are optimized is particularly important to businesses who manage these sites since they account for the majority of the downloaded bytes on a web page, and can slow down load times considerably. 
Read more
Improve your site with content personalization & A/B testing

Personalization of web content is becoming increasingly important for businesses to gain – and maintain – their competitive advantage. Web personalization is key to increasing conversion rates and return rates, as well as boosting retention, time-on-site, and page views, according to a December 2015 VentureBeat study, which noted that 87 percent of companies have seen a lift of at least 5 percent in their most important metrics as a result of personalization. 
Read more
Dynamic ZIP files generation with a single line of code

As a developer, you want to allow your users to download multiple files in a single click. An easy way to download multiple files and share them is to generate a ZIP file. When images are involved, you may also want to normalize the original images before including them in the ZIP file, by scaling them down to the same maximum resolution or converting them to the same format.

Read more