GEARCHECK LABPrint a simple A4 or Letter test sheet to inspect margins, alignment, fine lines and colour output. Choose actual size in the print dialog for the ruler check.
READY — choose an action below
No measurement yet.
The sheet contains code-defined colour blocks, thin line patterns and a square requested at 50 millimetres. Correct physical size depends on the print dialog, printer driver and any fit-to-page option. Missing edge markers can reflect the printer’s non-printable margin rather than broken alignment. Compare the pattern with the printer manufacturer’s own nozzle or alignment utility. RGB browser colours are converted through the print pipeline and are not a calibrated CMYK proof.
This page cannot read ink levels, command a nozzle cleaning or certify colour accuracy. Printer hardware margins can clip page edges. A visually clean sheet does not prove all mechanical parts are healthy. Print opens only when you ask, and no document is sent to a server. Browser PDF output tests layout but cannot test physical printer output.
Device previews, recordings, selected files and report notes stay in your browser. Downloaded files remain on your device. The call check sends small HTTP probes to GearCheck Lab. The WebRTC test exchanges temporary connection descriptions through our server and contacts the disclosed STUN service only after you create or join a session. Ordinary page requests and usage measurement are described in our privacy policy.