KeyDBCompatibility checker

Keycap & switch compatibility checker

Pick your switch, keycap profile and layout — get a verdict with reasons. Handles MX stems, low-profile mounts, sculpted vs uniform profiles, Alice/split row kits and the Hall Effect magnetic corner cases.

🔒 Runs in your browser. Nothing is uploaded. Results are also shareable — the URL updates with your selection.



What the checker judges

Stem × keycap mount

MX cross 4.1 mm, Kailh Choc, low-profile LP-MX, Hall Effect stem tolerances (box stems, pop-off risk on tight SA/MT3 skirts).

Profile × layout rows

Sculpted profiles need correct rows per layout (40%, 65%, 75%, 96%, Alice, split). Uniform profiles (DSA/XDA/KAT/KAM/MT3) need nothing extra.

HE board sockets

Wooting Lekker vs Gateron-family magnetic sockets — the #1 way people waste money on HE switches.

Height & clearance

Tall SA/MT3 caps vs low-clearance cases; LP caps vs full-height switches.

New to the vocabulary? Read how to read switch specs and the full keycap compatibility rules, or browse the layout guide.