Monitor test surfaces

Choose a solid color or gradient, then request fullscreen yourself. Escape or exiting returns to the controls. Observe by eye; there is no flashing or automated defect test. Color management, zoom and scaling affect the surface. Notes of up to 2000 characters stay in memory. This is a local browser observation only: no hardware diagnosis and no universal accuracy. Nothing is stored, recorded or uploaded, and no private-data telemetry is sent. Stop or reset clears the session. Browser, OS or permissions may leave results UNKNOWN.

Inputs stay in this tab and are not uploaded or saved automatically. Optional aggregate usage counts and coarse processing diagnostics are sent only after consent, without input content or filenames. Clearing or closing loses inputs; save needed outputs first.

Select a known solid color and a gradient, one at a time, then exit fullscreen. Compare them by eye; scaling and color management can change how they look.