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Getting Mozjpeg faster on x86 and ARM

On Optimizing Open Source Projects (The TL;DR version of this for those who just want the code, grab the fork here) Why optimize? Software is more of an art than a science. In software, there are a variety of programming languages and within each there are nearly an infinite number of ways to solve the same problem with different code. [...]

Images Are Slowing The Web. Let’s Fix It.

A slow-loading website will frustrate your audience and new visitors and in general will be viewed less favourably than faster-loading rivals. Why? Mostly because humans are impatient creatures and will get bored and wander off in approximately three microseconds. Here are some interesting references to support that assertion: A recent [...]

Autumn 2015 Updates

We’ve been hard at work streamlining our front-end, among other things. New Account Section We have revamped the My Account section, improving the look and feel of the interface, as well as adding several new sections (and improving existing ones). Details below: Responsive design: We know most of you use from your [...]

Service Improvements – September 2014

Hi everyone, we would like to inform you about a few improvements we did last week: Both Kraken API and Web Interface now accept images up to 16MB in file size. We migrated to the new Data Center in New York City with much better connectivity and uplink redundancy. We’ve also upgraded our dedicated machines with way better CPUs so [...]

Optimizing Images on Alexa’s Top 100 Global Sites

At we are pretty good at image optimization. This time we checked how well Alexa’s Top 100 Global Sites are optimized. On the 3rd of July 2014 we crawled those 100 websites and optimized all of their images – not only those found in img src but also those from CSS files (background images). On average we were able to save 12% [...]

Introducing Reseller Account

Our Premium and Enterprise plans are now Reseller enabled. If you would like to be a reseller, or provision your customers with Kraken API credentials which you can control the price of, our Reseller Account is perfect for you. Within your Reseller Account menu you can provision (or delete) sub-accounts with individual API credentials [...]

Service Updates For Early 2014

Hi everyone, We never stop improving Kraken – and as such, we have just rolled out some nice and useful new features including: UI enhancement: We have updated the UI of our Web Interfaces (both FREE and PRO) to make it lighter and sexier. New feature introduced: Chrome browser users can now drop entire folders to recursively [...] introduces Web Interface Pro

To all image optimization and web performance junkies, We just wanted to announce that we have revised our paid plans to something we think is more sensible than what we had before, based on a couple of important observations, which I’ll touch on below. Basing packages on a set number of images does not make any sense. For instance, a [...]