is a collection of Java libraries and tools dealing with the
Financial Information Exchange protocol (FIX),
an "electronic communications protocol initiated in 1992 for international real-time exchange of information related to the securities transactions and markets" (source:
All our projects are available on github:
is an open source library designed to assist in testing of applications using FIX protocol.
→ http://www.fix4jtest.org (homepage)
→ https://github.com/fix4j/fix4j-assert (github)
is a simple GUI which allows you to view fix messages in a human readable format.
→ https://github.com/fix4j/fix4j-fixpad (github)
NOTE: This project has moved to fix4j-assert.