Best Free Online Developer Tools to Use in 2026
A practical, opinionated list of the best free online developer tools worth using in 2026, organized by category so you can find what you need fast.
Aug 08, 2026
Shadow Controls
Shadow Layers
Preview
Tailwind class: shadow-custom
A Tailwind shadow generator helps you visually create custom box-shadow values and export them directly as Tailwind CSS configuration code. Instead of manually tweaking `box-shadow` values, you can use sliders, color pickers, and presets to create the perfect shadow, then copy the ready-to-use tailwind.config.js configuration.
The generated shadow can be used with the shadow-custom class (or your custom key name) in your Tailwind project.
tailwind.config.js snippet or CSS fallback with one click.Add the generated boxShadow config to your tailwind.config.js under theme.extend.boxShadow. Then use class="shadow-custom" in your HTML.
Yes. Click "+ Add Layer" to add additional shadow layers. Each layer is combined using comma-separated box-shadow syntax. You can remove any layer by clicking the × button.
The config code uses 'custom' as the key. You can rename it to anything you like in your tailwind.config.js file.
Yes. The generated CSS works with any version. For Tailwind v4, add the @utility shadow-custom directive instead of the config object.
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