Z-PO Project (OP-Z internals & file format)

Community reverse-engineering notes on the OP-Z, including the .opz project format

Z-PO Project blog post announcing the OP-Z file format documentation
Z-PO Project: the OP-Z file format.© lrk
Good to know
  • Heads up: Last updated in 2019; formats may have changed in later OP-Z firmware.

About

A community research project documenting the OP-Z's internals, most notably the .opz project file format, decoded almost byte for byte. The notes live in the GitHub repo's wiki with a companion blog. It's the reference to start from if you want to read or generate OP-Z projects in your own tools.

Devices
Pricing
open-source
By
lrk
Last verified
Oct 18, 2026
Source: Reddit