How to Downsize a Large PDF to a Smaller JPEG File. Adobe Acrobat, the native application for creating and editing PDF files, contains many tools that can be used to modify PDFs.

The idea isn't to replace JPEG, but tweak its settings to minimize the likelihood we'll notice problems when files are squeezed. Smaller file sizes might seem an arcane technology concern, but ...

Google has detailed its new JPEG encoder, which uses a psychovisual approach to deliver smaller file sizes without affecting image quality.

To overcome the internet speed problem, Google has developed a new open source image compression algorithm called Guetzli which reduces the JPEG size.