Shadows, type scales, color contrast, and critical CSS are the parts of frontend work where you end up nudging a value, reloading, and nudging again. These four free browser tools let you see the result while you adjust it, then copy the CSS when it looks right.
Here’s what each one does and when it’s worth reaching for: the CSS Shadow Generator, the Font Scale Calculator, the Color Contrast Checker, and the Critical CSS Extractor.
New Tools in Our Collection
CSS Shadow Generator
Creating the perfect shadow effect for your UI elements can be a time-consuming process of trial and error. Our new CSS Shadow Generator makes this process visual and intuitive:
- Create box-shadow and drop-shadow effects with a visual interface
- Adjust color, blur, spread, and position with real-time preview
- Layer multiple shadows for complex effects
- Copy the generated CSS code with one click
This tool is perfect for designers who want to create depth and dimension in their interfaces without the guesswork of manual shadow coding.
Font Scale Calculator
Typography is a fundamental aspect of web design, and creating a harmonious type scale is essential for professional-looking websites. Our Font Scale Calculator helps you:
- Generate a consistent type scale based on mathematical ratios
- Choose from popular ratios like the golden ratio, perfect fourth, etc.
- Visualize your type scale with real examples
- Export as CSS variables, SCSS, or Tailwind config
Whether you’re a designer establishing a new design system or a developer implementing typography, this tool helps ensure consistency and harmony in your text elements.
Color Contrast Checker
Accessibility is not optional in modern web development. Our Color Contrast Checker helps ensure your color combinations meet WCAG accessibility standards:
- Check contrast ratios between text and background colors
- See immediate feedback on WCAG compliance levels (AA/AAA)
- Get suggestions for similar colors with better contrast
- Test your entire color palette for accessibility
This tool is invaluable for designers and developers who want to create beautiful, accessible interfaces that work for all users.
Critical CSS Extractor
Page performance is crucial for user experience and SEO. Our Critical CSS Extractor helps you optimize your CSS delivery:
- Extract the CSS needed for above-the-fold content
- Reduce render-blocking resources
- Improve Core Web Vitals metrics
- Generate inline CSS for your HTML head
By focusing on the CSS that’s needed for the initial viewport, you can significantly improve perceived load times and user experience.
The Philosophy Behind Our Tools
As we expand our toolset, we remain committed to our core philosophy:
- Focus on solving specific problems - Each tool addresses a particular pain point in the development or design process
- Keep it simple and intuitive - No unnecessary complexity or bloated features
- Prioritize performance and reliability - Tools should work quickly and consistently
- Respect user privacy - All processing happens in the browser; no data is sent to servers
What Users Are Saying
We’ve been thrilled to see developers and designers incorporating our tools into their workflows:
“The Font Scale Calculator has become an essential part of my design process. It’s so much easier than manually calculating font sizes for a harmonious scale.” — Sarah K., UI Designer
“The Critical CSS Extractor saved me hours of work optimizing our landing page. Our Lighthouse score improved dramatically!” — Mark T., Frontend Developer
Looking Forward
We’re not stopping here. We’re already working on our next tool, the SVG Optimizer, which will help you clean and optimize SVG files for better web performance. We’re also continuously improving our existing tools based on user feedback.
If you have suggestions for new tools or improvements to existing ones, we’d love to hear from you. Our goal is to build tools that genuinely make your work easier and more efficient.
Try any of these now — all free, no signup: → CSS Shadow Generator · → Font Scale Calculator · → Color Contrast Checker · → Critical CSS Extractor
What tools would you like to see added to DevBottle next? Contact us with your suggestions.
