Optimizing End-Device File Size

Optimize images: The system will automatically compress images, and convert the format appropriate to the end user device in real time. If the device is mobile, the image size will be resized to fit the frame of the mobile device's screen. Customers can choose this mode when creating a CDN or editing an already created CDN. Besides, vCDN also supports Brotli compression standard**:** allowing customers to choose Brotli compression mode when creating a CDN or editing an already created CDN. The system will automatically switch back to GZIP if the terminal does not support the Brotli compression standard.

• (1): Automatically optimize the capacity and size of images on the website, the system will automatically compress, resize and convert image formats based on the terminal device. The same original image, if the device supports Webp images (the best compressed image standard currently provided by Google), will be automatically converted to Webp. If the end device is a small screen mobile device, the image will resized to fit small screen devices without changing image quality to increase image loading speed and increase user experience. Optimize source code**:** The system will automatically optimize source code HTML, JS, CSS. Customers can choose this mode when creating a CDN or editing an already created CDN.

• (2): Automatically optimize HTML source code according to PageSpeed ​​standards (provided by Google) to optimize page loading, and will also automatically minify (reduce, remove comments) the js and css files to minimize file size before delivering to users without changing the logic of the file.

• (3): New compression format - Brotli - helps HTTPS websites reduce capacity by 15% compared to the old compression type Gzip; Currently only supported on Chrominum kernel browsers, the system will automatically switch back to the old Gzip compression format if the end-user browser does not support the Brotli standard.