Design Tools
Free Online Design Tools for Web Designers
CSS generators, colour utilities, layout helpers — all free, all in-browser, no Figma subscription needed.
Published June 8, 2026 · 6 min read
Design work used to mean an expensive subscription and a heavy desktop app. For the day-to-day tasks that make up most of a web designer's work — picking a colour, generating a gradient, checking contrast, sizing a favicon — you don't need any of that. You need a URL, a browser, and ten seconds.
Here are 7 free online design tools that cover the most common CSS and visual design tasks, with no account required.
Build linear, radial and conic gradients visually
The CSS Gradient Generator lets you build gradients by moving colour stops on a live canvas and choosing linear, radial, or conic types. Copy the ready-to-use CSS property with one click.
Common uses: Hero backgrounds, button hover effects, decorative dividers, card backgrounds.
Multi-layer shadows with live preview
Adjust horizontal offset, vertical offset, blur, spread, colour and opacity with sliders and see the result instantly on a preview element. Stack multiple shadow layers for depth and realism.
Common uses: Cards, modals, buttons, floating action buttons, image frames.
Pick any colour and get HEX, RGB, HSL, and palettes
The Color Picker converts between HEX, RGB, and HSL in real time and generates five related palettes — complementary, analogous, triadic, split-complementary, and tetradic — from any base colour.
Common uses: Picking brand colours, converting colour codes, exploring colour relationships.
Generate complementary, analogous and triadic palettes
Enter any hex colour and the palette generator computes all five classic harmony types using HSL rotation. Every palette is shown with hex values you can copy individually or all at once.
Common uses: Creating cohesive UI colour schemes, matching brand guidelines, exploring colour theory.
Check WCAG AA and AAA accessibility compliance
Paste a foreground and background colour and the checker calculates the contrast ratio and shows whether it passes WCAG 2.1 AA (4.5:1 for normal text) and AAA (7:1) standards for both normal and large text.
Common uses: Checking body text, button labels, icon colours before shipping a design.
| 8px | → | 0.5rem |
| 16px | → | 1rem |
| 24px | → | 1.5rem |
| 32px | → | 2rem |
| 48px | → | 3rem |
Convert pixels to rem with configurable base font size
Enter a pixel value and get the equivalent rem value at any base font size (default 16px). Paste a block of CSS and convert all px values to rem in one pass — useful when migrating an existing stylesheet to a fluid type scale.
Common uses: Converting fixed designs to fluid layouts, setting up type scales, migrating px-based CSS.
Generate favicons in all sizes from any image
Upload any image and download favicon files at 16×16, 32×32, and 192×192 pixels — the three sizes needed to cover all modern browsers, PWA home screens, and browser tabs.
Common uses: Launching a new site, adding PWA support, updating brand assets.
All 7 tools at a glance
All tools are free and run in your browser. Visit the Design Tools hub for the full list, or browse everything from the Nutilz homepage.