Hardware & System

Free hardware and system tools in your browser — test a keyboard for dead or stuck keys, check a screen for dead pixels and its refresh rate, measure with an on-screen ruler, keep a PC awake with a mouse jiggler, or look up a SATA power pinout. Nothing to install, and no account.

7 tools available

Keyboard Tester

Test keys for dead keys, ghosting & rollover

Pure Red Screen

Red screen test for dead pixels & OLED burn-in

Refresh Rate Test

Live monitor Hz test with a frame-time graph

SATA Power Pinout

Tap a pin for its voltage, wire color & test tip

Screen Mouse Jiggler

Trick an optical mouse into keeping your PC awake

Screen Ruler

Drag to measure pixel distance, size & angle

Virtual Keyboard

On-screen keyboard — click keys to type, then copy the text

Every tool runs in your browser — no upload, no account, free.