Cmdex is an offline command & syntax reference for developers, sysadmins, and students — 23 platforms, searchable instantly, with a real working example for every entry.
A universal command palette searches all 23 platforms simultaneously — no more guessing which reference to open.
Every command includes a plain-English explanation and a runnable example, not just a flag list.
Built-in spaced-repetition review turns lookups into muscle memory, with streaks and review history.
Save the commands you use most and organize them into your own custom collections.
Export any platform to a PDF cheat sheet for offline reading or printing.
No account, no sign-in, no internet connection required — everything is bundled on-device.