Bootstrap Class Lookup
CSSSearch Bootstrap 5 CSS classes and components.
Adjust values and click Generate CSS
ℹ️ About Bootstrap Class Lookup
Bootstrap Class Lookup is a free online CSS tool from Tools Coaster. Search Bootstrap 5 CSS classes and components. It is handy for bootstrap, class, lookup tasks. It runs entirely in your browser — no sign-up, no installs, and nothing you enter ever leaves your device.
📖 How to Use Bootstrap Class Lookup
1
Set your options
Adjust the values or paste the CSS you want to work with.
2
Run Bootstrap Class Lookup
The tool produces ready-to-use CSS instantly.
3
Preview the result
See the effect and the generated code update live.
4
Copy into your stylesheet
Copy the CSS straight into your project.
💡 Examples
CSS example
INPUT
Your settings or CSS→
OUTPUT
Generated CSS from Bootstrap Class Lookup🚀 Pro Tips
✓Combine with the color tools to match your palette.
✓Minify final CSS before shipping to production.
✓Copy the generated CSS and tweak the values to fine-tune the effect.
✓Test across browsers — a few properties still need vendor prefixes.
✓Keep units consistent (px, rem, %) for predictable layouts.