Responsive Images on Autopilot

Responsive image of a watch showcased on various devices

What are responsive images?

Responsive images are automatically scaled to suit the users’ screen. Smaller screens receive smaller images, Retina screens receive Retina images. Pages load faster and users enjoy a more personal experience.

Personalized for every visitor

Sirv introduces a new benchmark for responsive images. Rather than serve the nearest of 3 or 4 fixed widths, Sirv delivers the exact dimensions per device. It’s the ultimate solution for today’s myriad of mobile devices.

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Responsive and optimized

Newly generated images are created in just 0.15 seconds, then cached for CDN delivery in just 0.01 seconds. Images are converted to the most optimal image format (often WebP) to a fraction of their original size.

Lazy-loading on demand

Even better than fast loading is no loading (when it’s not needed). When an image out of sight, Sirv only loads it if the user scrolls down to it. This lazy-loading technique brings yet another boost to loading speed.

Easy to integrate

Responsive images for every platform

Upload your website images to Sirv with free and ready-to-install plugins and extensions for WordPress, Shopify, Magento, and more. Sirv team will gladly guide you if any questions come up.

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One master image is all you need

The fresh new approach to truly responsive images

The old way

Resize image into at least 3 sizes.
Double up the 3 sizes, for Retina screens.
Export them in the formats you want (JPEG/WebP/PNG).
Optimize them for web delivery.
Write the code to detect and serve the right image.

<img srcset="car-320.jpg 320w, car-480.jpg 480w, car-800.jpg 800w" sizes="(max-width: 320px) 280px, (max-width: 480px) 440px, 800px" src="car-800.jpg">

The Sirv way

Upload one image.
Copy/paste the code.

<img class="Sirv" alt="black car image" data-src="https://demo.sirv.com/car.jpg">
<script src="https://scripts.sirv.com/sirv.js"></script>

Businesses love Sirv

Sirv is fantastic! I have a lot of images on my website, and most of them are large, which resulted in slow site speeds, even with a CDN. What I love about Sirv is that they offer a CDN service, but also dynamically resize images based on the user’s browser/device, and serve the right file type. It has meant HUGE speed improvements on my website. In addition to this, their WordPress plug-in works a treat. I was worried about having to move my entire media library to Sirv myself, but the plug-in automates this process without any glitches. Support team is also very responsive and fast. Highly recommended!