What it does
- Seven layout flaws to fix with one slider each, no numbers
- Mix of exact rounds and optical ones designers learn the hard way
- The perfect value appears after every round, with the reason
- Shareable result with your precision per round
FAQ
Why does a play icon need to sit right of center?
A triangle’s visual weight is at its centroid, a third of the way from its flat side, so centering its bounding box makes it look shifted left. Nudging it right by about a sixth of its width fixes it.
Why should a circle be bigger than a square?
A circle covers less area than a square of the same width, so it looks smaller. Icon grids and typefaces make round shapes about 10 to 13% larger to compensate.
More free tools
- Palette Generator - Pick a hue, choose a color harmony, and get a full accessible palette with live AA/AAA contrast checking.
- Contrast Checker - Paste two colors, see the WCAG ratio, and fix a failing pair with a single click.
- Image → Palette - Drop in an image, pull out its dominant colors, and see which pairs are safe to use together.
- Color Blindness Simulator - See a palette through protanopia, deuteranopia, tritanopia and achromatopsia - and catch colors that collapse.
- Type Scale Generator - Pick a base size and a ratio, get a full type scale with live preview, fluid clamp() and tokens to copy.
- Gradient & Mesh Generator - Linear, radial, conic or blobby mesh gradients - drag the points, shuffle the colors, copy the CSS.
- Component States Explorer - Buttons, inputs and cards in every state - hover, focus, pressed, disabled, error - side by side with contrast checks.
- Design Token Converter - Paste W3C tokens, Tokens Studio or Figma Variables JSON and get CSS, SCSS, Tailwind v4 or SwiftUI - aliases included.
- Motion & Easing Playground - Drag cubic-bezier handles, tune a real spring, watch them race, and export motion tokens as CSS linear(), Framer Motion or SwiftUI.
- Auto-Trim - Drop in PNGs and get them back without the empty transparent edges - in bulk, in your browser, as one ZIP.
- Text Expansion Stress Test - See how a UI breaks in German, Spanish or pseudo-localized text - and which CSS fixes make it survive translation.
- Mini A11y Audit - Paste HTML and find missing alt text and labels, unnamed buttons, heading jumps, tiny tap targets and low contrast.
- Multi-size Preview - One message laid out across social and display-ad sizes, with platform safe zones and a draggable focal point. Export every PNG.
- Mobile Preview - Open any website inside iPhone, Pixel, Galaxy and iPad frames at their real viewport sizes. Rotate it or compare four devices at once.
- Hue Hunt - Match five colors by eye with hue, saturation and lightness. Scored by perceptual distance, with a daily challenge to share.
- Pass or Fail - Twenty quick rounds: does this text pass WCAG AA contrast? Trust your eye, then see the real ratios.
- State Panic - Components fall with something happening to them. Pick the right UI state before they hit the floor.
- Easing Golf - Mini golf with animation curves: shape a cubic-bezier so the puck hits every flag on time. Par is three.
- Contrast Survival - The background keeps shifting. Hold the text lightness so it passes WCAG AA, then AAA, as long as you can.
- Token Rush - Swap hard-coded values for the right design tokens, fast. Then flip the theme and see what breaks.
- Kern Me - Space six words by eye. Each has one letter pair too tight or too loose; the answer is the font designer’s own kerning.
- Tab Order - Tap a screen’s buttons, links and fields in the order the Tab key should visit them. Five screens, one WCAG rule.