Toolkit
Display tools
Everything runs in your browser — no uploads, no accounts, no ads. Quick utilities for anyone who works with screens.
Aspect ratio calculator→
Solve any width:height ratio and resize dimensions while keeping proportions locked.
PPI & size calculator→
Work out pixel density, dot pitch and physical screen size from resolution and diagonal.
Screen size comparison→
Compare two displays drawn to true scale and see the real difference in area.
Dead pixel test→
Cycle full-screen solid colours to reveal dead, stuck or hot pixels.
Colour test→
Gradients and solids to check colour accuracy, banding and panel uniformity.