01Two hand models, four profiles
Ergonomics depend entirely on where your hand naturally rests during gameplay. Rather than applying a generic typing model, the Keybind Checker uses two distinct kinetic models:
Anchored Hand Model (FPS & MMO)
The palm heel rests firmly on the desk or wrist pad with the index, middle, and ring fingers anchored to the movement cluster (WASD). Reach is determined by finger flexion and extension relative to this fixed anchor.
- FPS: Fast lateral strafing with instantaneous access to Jump, Sprint, Crouch, and Reload.
- MMO: High keybind density utilizing WASD plus the number row (1–6) and pinky modifiers (Shift, Ctrl).
Hover Hand Model (MOBA & ARPG)
The wrist hovers slightly or rests higher to allow rapid finger translation across a broad ability plane (QWER / 1–4) without being locked to four-way directional movement.
- MOBA: Four primary ability fingers aligned on QWER, with thumb access to Space and index extension to Summoner Spells (D, F).
- ARPG: Rapid sequential potion and cooldown triggering along the number row and QWER, paired with click-to-move input.
Why there is no ergonomics score
A single 0–100 score would hide the actual reason why a bind is problematic. A layout that scores "84/100" might still place an essential defensive cooldown on an unreachable key or assign two concurrent held abilities to the same finger.
Instead of artificial gamified grades, the tool shows:
- The exact conflicting keys and actions
- Physical reach distances (Home, Easy, Stretch, Far, Mouse Hand)
- Biomechanical finger assignment conflicts (e.g. middle finger assigned to both forward move and held crouch)
- Concrete, actionable suggestions with available nearby free keys
03Any game, not just the templates
The four built-in profiles are pre-tagged checklists designed to jumpstart your analysis, not rigid mandates. You can easily add custom actions for any game title:
Whether you need a dedicated Push-to-Talk key for Discord, a quick ping wheel in Apex Legends, or an ultimate macro in World of Warcraft, custom actions receive the same rigorous reach and concurrency checks as core movement keys.
04The two toggles that drive everything
Every action evaluation is driven by two critical flags:
Held
Indicates that the action is physically held down for an extended duration (e.g. Sprint, Aim Down Sights, Scoreboard, Move Forward).
Two held actions mapped to keys operated by the same finger are flagged as IMPOSSIBLE because the human hand cannot press two distinct keys simultaneously with one finger.
Critical
Marks an action as reaction-sensitive or survival-critical (e.g. Interrupt, Flash, Health Potion, Reload).
Critical actions mapped to Stretch or Far zones trigger ergonomic warnings, and any unbound critical action is prominently flagged.
Browsers operate inside a sandboxed security model. Certain system combinations cannot be captured by client-side web applications:
- Ctrl+W, Ctrl+T, Ctrl+N: Captured by browser tab management.
- Alt+Tab, Alt+F4, Win Key: Intercepted directly by the host operating system.
To analyze binds that use these modifiers, toggle the modifier buttons and select the target keycap on the board.
When you click Copy link, the checker compiles your current profile, layout, action binds, held toggles, critical flags, and custom actions into a URL-safe encoded string.
Nothing is stored on a server. The recipient's browser deserializes the URL parameters instantly, reconstructing your exact layout and analysis findings.
07Frequently asked questions
Does the checker know which keyboard I own?
No. It reasons about position and reach on a standard layout. It cannot see your switches, firmware or key matrix, so pair it with a physical key test for hardware questions.
Why does it flag a bind I have used for years?
A flag is a reach or conflict warning, not a verdict. If a stretch is comfortable for your hand, keep it - the tool exists to make the trade-off visible, not to decide for you.
Can I check binds for a game that is not in the templates?
Yes. Add your own actions and bind them; the templates are starting points for common shooters, not the limit of what the checker accepts.
Does it test whether two keys register together?
No, that is a hardware limit rather than a layout problem. The Anti-Ghosting Test measures how many keys your board can report at the same time.
Does it work for a 60 percent or numpad-less keyboard?
Yes. Binds that land on keys your board does not have are still shown, which is the fastest way to spot a layout that quietly assumes a numpad or a full function row.
