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How do I apply responsive typography classes to adjust font sizes based on screen size in Bootstrap?

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How do I apply responsive typography classes to adjust font sizes based on screen size in Bootstrap?

Asked on Nov 23, 2025

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In Bootstrap 5, you can use responsive typography utility classes to adjust font sizes based on screen size. These classes follow the pattern `fs-{size}` where `{size}` ranges from 1 to 6, with 1 being the largest.

<!-- BEGIN COPY / PASTE -->
        <p class="fs-1">Extra large text on all screens</p>
        <p class="fs-2">Large text on all screens</p>
        <p class="fs-3">Medium text on all screens</p>
        <p class="fs-4">Small text on all screens</p>
        <p class="fs-5">Smaller text on all screens</p>
        <p class="fs-6">Smallest text on all screens</p>

        <!-- Responsive example -->
        <p class="fs-1 fs-md-3 fs-lg-5">Responsive text size: large on small screens, medium on medium screens, and small on large screens</p>
        <!-- END COPY / PASTE -->

Additional Comment:

Use `fs-{size}` to set a consistent font size across all screen sizes.
For responsive typography, combine `fs-{breakpoint}-{size}` classes to adjust font size at different breakpoints.
Breakpoints include `sm`, `md`, `lg`, `xl`, and `xxl`.
The example shows how to set a font size that changes at different screen sizes using responsive classes.

✅ Answered with Bootstrap 5 best practices.

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How do I apply responsive typography classes to adjust font sizes based on screen size in Bootstrap?

Asked on Nov 23, 2025

Answer

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