John Haller

John Haller
CEO and Lead Developer,

Website | @johnthaller

John T. Haller is the founder and lead developer of, the world’s most popular portable software platform allowing anyone to take their applications with them on a USB flash drive or other removable device and use them on any PC. He has a deep interest in using computers and software in new ways and enabling software to work the way users think.

John is best known for creating portable software like Firefox Portable but has also become known for online jokes (see: MAFIAA ) and fun utilities (see: Billy Mays Caps Lock ). Before creating, he founded a web development firm, donated a kidney, worked in a tech startup, worked in a corporate bank, went to college and did various other things.


Tools and Techniques
Location: D133
John Haller (
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A portable app is a program that you can carry around with you on a portable device (USB drive, cloud drive, mobile phone, etc) and use on any Windows or Linux PC you plug it into. This session will cover why making your software portable makes sense and how to do it using open source tools. Read more.