Focus Indicator Designer – Online CSS Outline Generator
Visually design a custom :focus‑visible outline style. Copy the CSS. Better than the default.
UD5 Toolkit
Pick any color from your screen instantly using the EyeDropper API
<input type="color"> color picker, allowing you to still select colors using your operating system's native color picker dialog. The fallback option appears automatically when needed.
#FF5733). It's the most common format used in web design and CSS. RGB (Red, Green, Blue) expresses colors as three decimal values from 0–255 (e.g., rgb(255, 87, 51)), representing the intensity of each color channel. HSL (Hue, Saturation, Lightness) describes colors more intuitively: Hue is the color wheel angle (0–360°), Saturation is color intensity (0–100%), and Lightness is brightness (0–100%). HSL is often preferred by designers because it's easier to adjust shades and tints. This tool provides all three formats for your convenience.
<input type="color"> element, which opens your device's system color picker. While not as seamless as the desktop eyedropper experience, you can still pick colors effectively on mobile. For the best experience, we recommend using a Chromium-based browser on desktop.
localStorage. This means your picked colors remain on your device and are never transmitted to any server. You can clear the history at any time by clicking the "Clear" button. The history persists across browser sessions (even after closing and reopening the browser) until you manually clear it or clear your browser's local storage. Up to 24 colors are retained, with older entries being removed when the limit is reached.
Visually design a custom :focus‑visible outline style. Copy the CSS. Better than the default.
Paste your CSS and see warnings for properties that have limited browser support. Links to CanIUse. Modernize safely.
Define password rules and see a live checklist that updates as you type. Design better password UX for your app.
Paste a screenshot or image, crop it, and add arrows, rectangles, and text. Essential for bug reports and tutorials.
Load images or use colors and apply all 15 CSS blend modes. Visual tester for creative effects.
Find the ideal height to hang art based on wall and furniture dimensions. Follow gallery standard 57‑inch center rule.
Test your device's built‑in biometric (Touch ID, Face ID, Windows Hello) using the Web Authentication API. Register and verify.
See the difference between :focus and :focus‑visible on interactive elements. Learn which to use for better UX.
Project your retirement savings growth with monthly contributions, employer match, and CAGR. Interactive chart. Financial data stays on your device.
Paste code and generate a beautiful, syntax‑highlighted PNG image. Choose theme and window style. Shareable code pics.
Enter container width, number of items, gap, and flex‑basis. See the resulting sizes instantly. Plan your flex layout.
Design neumorphic elements by adjusting box‑shadow parameters. Real‑time preview and CSS output. For modern soft UI interfaces.
Create beautiful, syntax-highlighted screenshots of your code snippets. Choose themes and export as PNG. All client-side canvas rendering.
Design a tooltip that appears on hover without JavaScript. Choose positioning, arrow, and animation. Copy the clean HTML/CSS.
Design layered box shadows interactively and get the CSS code in real time. Adjust offset, blur, spread, and color. Essential tool for UI designers.
Upload an image and get a suggested alt text description using a local vision model (WASM). Improve SEO and accessibility fast.
Translate between binary and Gray code (reflected binary code). See the bit changes. Useful for digital logic.
Interactively add and adjust multiple box shadows on a sample element. Drag sliders for offset, blur, spread, and color. Copy the clean CSS code instantly.
Paste an HTML snippet and get a report on missing, empty, or suspicious alt texts. Improve your image SEO and a11y.
Convert 3-digit capacitor codes (like 104, 222) to capacitance value in pF, nF, µF. Also converts back. Useful for reading tiny ceramic capacitors.
Enter an amount and see a virtual stack of $100 bills with height comparison to everyday objects.
Use isolation: isolate to contain mix‑blend‑mode and filters. See the visual difference with and without. Quick demo.
Adjust margin, border, padding, and content sizes interactively and see the rendered box model. Get the exact CSS. Teach or learn layout.
Select plant type and pot size, click through a visual guide to perform a finger test and decide when to water.
Select character sets (Latin, Cyrillic, Greek) and generate the exact unicode‑range descriptor for your fonts. Improve performance.
Create inner shadows for a pressed or sunken effect. Visually adjust and copy the CSS. Learn inset.
Build a .editorconfig file by setting indentation, charset, and end‑of‑line rules for your project. Keep all contributors aligned.
Set up a Shared Worker that shares state across multiple browser tabs. Counter and messaging demo. Advanced web.
Type a password and see a bar that fills based on estimated bits of entropy. Color‑coded feedback. No storage.
Enter your hole cards and the community cards to see probability of winning, drawing, etc. Simple simulation in browser. Educational, not gambling.