Generate perfect squircle shapes and continuous curvature corner radii for web design. Create modern CSS border-radius shapes with our free, instant browser tool.
AI Generation Prompt
Free Smooth Squircle & Rounded Corner Generator
Overview
A high-precision, client-side web utility that allows designers and developers to calculate and generate continuous curvature (squircle) shapes. It provides real-time CSS/SVG code output for implementing modern, Apple-style corner radii in web and mobile applications.
Core Features
- Live Visual Preview: Interactive container that updates in real-time as users modify the curvature and size parameters.
- Precision Sliders: Micro-adjustable sliders for controlling "corner magnitude" and "squircle intensity".
- Dual Export Formats:
- CSS Mask: Generate optimized
mask-imagecode using SVG definitions. - SVG Clip-path: Generate standardized
<clipPath>definitions for highly performant masking.
- CSS Mask: Generate optimized
- One-Click Copy: Dedicated buttons to copy code snippets directly to the clipboard.
- Instant Reset: Clear the current state to default without refreshing the page.
- No-Storage Architecture: Fully stateless implementation. All calculations occur in-memory.
UI/UX Design
- Layout:
- Header: Clean, minimalist title with a short description.
- Main Content: A responsive two-column grid. Left side holds control sliders and configuration; right side hosts the visual preview area.
- Footer Area: Contains a code display panel that updates instantly when sliders move. Read-only textareas allow for easy selection.
- Aesthetics:
- Palette: Crisp white background (#FFFFFF), slate grey text (#334155), and vibrant accent blue (#2563EB) for active states/buttons.
- Typography: System-stack sans-serif (Inter/SF Pro) for maximum readability.
- Micro-interactions: Subtle transition effects on sliders (linear), hover states on buttons with slight lift shadows, and a gentle flash notification when code is copied.
Technical Directives for Developer
- Framework: Vanilla JavaScript, HTML5, and Tailwind CSS (via CDN).
- Sandboxing Compliance:
- Do not use
localStorage,sessionStorage, orcookies. Application state must be stored in simple JS objects/variables. - No
alert(),confirm(), orprompt(). Use hidden<div>elements as modal layers if user feedback is required.
- Do not use
- Responsive: Use Tailwind’s responsive modifiers (e.g.,
md:grid-cols-2) to stack the controls and preview on smaller screens. - Accessibility: Ensure all interactive elements (sliders, buttons) have proper
aria-labeltags and are keyboard navigable. - Single File: All logic, styles, and HTML markup must exist within the single index.html file. No external assets that aren't loaded via CDN.
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Frequently Asked Questions
Everything you need to know about using this application.
What is a squircle and how does it differ from a standard rounded corner?
A squircle is a geometric shape that represents a hybrid between a square and a circle. Unlike standard CSS border-radius, which uses circular arcs that create a visible 'jump' in curvature where the straight line meets the arc, a squircle features continuous curvature. This continuous curvature is the hallmark of modern, high-end digital design interfaces. By using mathematical formulas to transition between the flat edge and the curve, the shape appears more organic and visually balanced, effectively reducing the sharp visual transition points found in standard geometry.
How can I implement the generated squircle shapes in my CSS?
There are two primary ways to implement these shapes in a web project: using modern CSS properties or utilizing SVG clip-paths. The most direct method is using the `mask-image` property combined with a generated SVG shape, which allows the squircle to perfectly clip any background or content contained within the element. Alternatively, for simpler implementations, developers can use advanced `border-radius` syntax with multi-value percentages, though this is an approximation. For pixel-perfect continuous curvature, we highly recommend using the SVG clip-path method provided by this generator to ensure consistent rendering across all modern web browsers.
Is this tool compatible with all web browsers?
Yes, the shapes generated by this tool are compatible with all modern, standards-compliant web browsers including Chrome, Firefox, Safari, and Edge. Because the tool focuses on generating standard CSS or SVG clip-path code, you do not need to worry about browser-specific rendering engines. Since this application runs entirely in your browser using standard technologies, the code you copy and paste into your project will behave exactly like any other CSS or SVG element, ensuring that your layout remains responsive and performant across mobile and desktop devices without requiring external dependencies.
Can I use this tool offline?
This application is built as a single-file, browser-based utility. While you require an initial internet connection to load the application from the server, once the page is fully loaded, it functions entirely within your browser's memory without needing to make further server requests. Because this tool is sandboxed and does not use local storage or server-side databases, your data and generated shapes are strictly ephemeral. If you refresh the page, your current configuration will reset, which ensures maximum privacy and security for your workflow as no data is ever tracked or stored.
