A Visual Editor for Karabiner
Visual Karabiner editor eliminates hand-editing karabiner.json for complex remappings.

Visual Kanata config builder eliminates .kbd file syntax, instant apply.
Mac power users and keyboard enthusiasts avoiding Lisp syntax
Karabiner-Elements · QMK · Kanata
The best keyboard remapping engine on macOS (Kanata) requires editing .kbd files which is a pain. Karabiner-Elements is easy for simple single key remapping (e.g. caps -> esc), but anything more wasn’t workin out for me.
What you can do with Mantle: - Layers: hold a key to switch to a different layout (navigation, numpad, media) - Homerow mods: map Shift, Control, Option, Command to your home row keys when held - Tap-hold: one key does two things: tap for a letter, hold for a modifier - Import/export: bring existing Kanata .kbd configs or start fresh visually
Runs entirely on your Mac. No internet, no accounts. Free and MIT licensed
Would love feedback, especially from people who tried Kanata or Karabiner and gave up
Visual Karabiner editor eliminates hand-editing karabiner.json for complex remappings.
Visual keyboard mapper for hidutil, though Karabiner-Elements handles more complex remapping.
Visual node diagrams make CSS cascade relationships explicitly clear to developers.
CSS inspector that persists edits across reloads, solving the DevTools reset pain.
Git worktree isolation per agent session is genuinely clever for parallel work.
Preserves comments, blank lines and option ordering while giving you type-aware widgets (toggles, enums, color pickers) and a live theme browser with inline color swatches. It even triggers SIGUSR2 to hot-reload Ghostty and hides irrelevant options by OS — smart, pragmatic touches that make a narrow problem genuinely less annoying.