A read-only macOS app that parses .logicx projects so you can see the plug-ins, tracks and metadata inside (and tell whether it will open cleanly on this Mac) in a fraction of the time Logic takes to launch.
If you've used Logic for years, you probably have folders full of projects with names that tell you next to nothing. Opening each one to jog your memory means waiting for Logic to launch, then waiting for the project to load (and sometimes discovering a plug-in is missing only once you're already there).
LPX Explorer answers four questions instantly: what's in this project?, will it open cleanly on this Mac?, what does it sound like? and which Logic version made it?
Tested against ~150 projects across ~25 GB.
Pure genius! Clearly a LP user who scratched that itch we all have but never did anything about it...
This is amazing! I was looking for something that would report the plugins used in a project.
I just tried it and it should save me a lot of time, especially looking at my archived projects.
Just downloaded this and am thoroughly impressed with it. Thank you. And, Yes, it is well along the way to becoming a sellable plugin, even if not so already...
Very smart
OH MY GODDD I COULD KISS YOU, can't wait to try this out
This is really dope!! Thank you for sharing
Apple is gonna buy this, get ready! Good job and thanks
LPX Explorer cross-references the Audio Units a project references against the plug-ins actually installed on your Mac, so you find out about a missing instrument before Logic does.
Every referenced plug-in is installed. Open with confidence.
Some plug-ins are missing or substituted. You can search for or copy the fingerprint of each one.
Critical components are unavailable on this Mac. Sort it out first.
Your projects are irreplaceable. LPX Explorer is built so that changing a file's contents is impossible by design, and automated tests confirm that on every release.
The part of the app that understands your projects is only ever handed the data to read. It has no ability to open, change or save a file. That capability simply isn't built into it.
When you open a project, LPX Explorer reads it a single time and passes the contents along to be inspected. Nothing is ever written back to your files.
A built-in test takes a fingerprint of a project before and after the app reads it, then confirms nothing changed: not a single byte, and not even the date it was last modified.
If that check ever fails, the release is blocked automatically, so the guarantee can't silently stop being true from one version to the next.
Still: keep backups. LPX Explorer parses an undocumented binary format that Apple may change at any time. The read-only invariant covers the parser, but you're pointing it at irreplaceable creative work. Use at your own risk.
macOS only. It's a native app for Apple silicon and Intel Macs. There's no Windows or Linux build, because Logic Pro is macOS-only.
It checks Audio Unit (AU) plug-ins only, the format Logic uses. It scans the plug-ins installed on your Mac when it starts up, remembers them for the session, and lets you rescan manually when you install something new.
No, and that's deliberate. It's read-only by design: it inspects, it never writes. If you need to fix a project, do it in Logic.
Two known quirks, both real rather than bugs: Logic keeps prior plug-in references in ProjectData after you swap one (undo history), and other Alternatives inside the bundle carry their own references. Open the project in Logic to see what the active alternative actually loads.
It's free and open source under GPL-3.0. If it's saved you some time, donations are welcome but never required, and nothing is gated behind them.
Only anonymous counts. The app pings a privacy-friendly service (GoatCounter) to count installs and upgrades, so I can see roughly how many people are using it. No personal data, IP addresses, sessions or in-app activity are collected. This website uses the same cookieless analytics and nothing else.
lpx-toolkit is the original Python CLI, built first to reverse-engineer the .logicx structure. LPX Explorer is the desktop app, with the format knowledge now living in a Rust parser library that both will eventually share.
If LPX Explorer has saved you from opening sketchy old projects in Logic, a tip is genuinely appreciated and helps with future releases.