# Frontend & CSS

> CSS layout builders, converters, and visualizers for Flexbox, Grid, and modern UI effects.

- **Source:** DevDreaming (https://devdreaming.com)
- **Canonical URL:** https://devdreaming.com/tools/category/frontend-css

---

CSS layout builders, converters, and visualizers for Flexbox, Grid, and modern UI effects.

All tools run client-side in your browser -- no signup, no upload.

## Tools in this category

- [Clamp() Calculator](https://devdreaming.com/tools/clamp-font-size-calculator) -- Generate the CSS `clamp()` function for fluid, responsive typography based on min, max, and viewport values.
- [Pixel to REM Converter](https://devdreaming.com/tools/px-to-rem-converter) -- Convert pixel values to REM/EM units based on a specified root font size (e.g., 16px).
- [Aspect Ratio Calculator](https://devdreaming.com/tools/aspect-ratio-calculator) -- Calculate dimensions based on a target aspect ratio (e.g., 16:9, 4:3) for images and videos.
- [Cursor CSS Previewer](https://devdreaming.com/tools/cursor-property-viewer) -- Preview all available CSS `cursor` property values (e.g., grab, pointer, progress).
- [CSS Triangle Generator](https://devdreaming.com/tools/triangle-generator) -- Generate pure CSS code for creating triangular shapes, common in tooltips and flags.
- [Box Model Visualizer](https://devdreaming.com/tools/css-box-model-visualizer) -- An interactive tool to understand padding, border, and margin on the CSS Box Model.
- [CSS Variables Generator](https://devdreaming.com/tools/css-variables-generator) -- Generate a set of semantic CSS Custom Properties (`--vars`) from a color palette.
- [Viewport Size Checker](https://devdreaming.com/tools/viewport-size-checker) -- Determine the exact viewport width and height of the current browser window.

---

## Related on DevDreaming

- [All Free Developer Tools](https://devdreaming.com/tools)
- [Blog & Tutorials](https://devdreaming.com/blogs)

---

_This is the Markdown twin of a page on **DevDreaming** -- free developer tutorials, tools, and AI resources. Source of truth: the canonical HTML URL above._