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Bootstrap class: .text-*-right

<p class="text-right">Right aligned text on all viewport sizes.</p>
<p class="text-sm-right">Right aligned text on viewports sized SM (small) or wider.</p>
<p class="text-md-right">Right aligned text on viewports sized MD (medium) or wider.</p>
<p class="text-lg-right">Right aligned text on viewports sized LG (large) or wider.</p>
<p class="text-xl-right">Right aligned text on viewports sized XL (extra-large) or wider.</p>

Preview

Right aligned text on all viewport sizes.

Right aligned text on viewports sized SM (small) or wider.

Right aligned text on viewports sized MD (medium) or wider.

Right aligned text on viewports sized LG (large) or wider.

Right aligned text on viewports sized XL (extra-large) or wider.