01 / Why it exists
Make a closer look easier
Knur borrows its attitude from precision workshop tools: direct controls, legible markings, and no decorative detours between you and the work.
The patterns are rendered by your browser. They support careful observation, but they do not replace measurement equipment or a qualified service assessment.
02 / What you can inspect
Nine focused visual references
Solid ColorCycle through black, white, RGB, cyan, magenta, and yellow to look for unusual bright, dark, or fixed pixels.
Black ScreenUse an uninterrupted black field to inspect possible edge glow, bleed, clouding, or uneven dark areas.
Uniformity FieldsCompare center, edges, and corners across neutral fields at several brightness levels.
Pixel GridSwitch among horizontal lines, vertical lines, a reference grid, and a checker pattern.
Sharpness TargetInspect fine text, radial lines, concentric targets, and corner detail for apparent softness or halos.
Contrast StepsCompare near-black and near-white steps to see whether adjacent tones remain distinguishable.
Grayscale RampView stepped and continuous gray ramps for abrupt jumps, tinting, clipping, or visible banding.
Color RampsInspect red, green, blue, cyan, magenta, and yellow transitions from dark to bright.
Motion TrailTrack a moving reference at three speeds to compare perceived blur, trailing, and animation smoothness.
03 / Principles
How Knur is designed
Direct access
The most detail-oriented patterns appear first.
Repeatable checks
Simple instructions encourage the same scan path each time.
Technical honesty
Scaling and browser limitations are stated where they matter.