How to customize the Bootstrap breakpoints

How to customize the Bootstrap breakpoints

Responsive web design has become a cornerstone of modern web development, enabling websites to adapt seamlessly to various screen sizes and devices. Bootstrap, the popular front-end framework, comes with predefined breakpoints that dictate how content is displayed on different devices. However, sometimes these default breakpoints might not align perfectly with your design vision. In this guide, we’ll explore how to customize Bootstrap breakpoints to achieve a responsive design that caters precisely to your project’s needs.

Understanding Breakpoints in Bootstrap

Breakpoints in Bootstrap define the points at which a website’s layout changes to fit different screen sizes. These breakpoints determine when columns stack, navigation menus collapse, and other responsive adjustments occur. Bootstrap’s default breakpoints are:

  • Extra small: Up to 576px
  • Small: 576px to 768px
  • Medium: 768px to 992px
  • Large: 992px to 1200px
  • Extra large: 1200px and above

While these breakpoints work well for many projects, there are instances where you might want to fine-tune them for a more tailored responsive experience.

Why Customize Bootstrap Breakpoints

Customizing Bootstrap breakpoints offers several benefits:

  1. Design Consistency: Custom breakpoints allow you to maintain design consistency across various devices, ensuring your content appears as intended.
  2. Optimized User Experience: Tailoring breakpoints to your content’s nature ensures that users get the best experience, regardless of the device they’re using.
  3. Enhanced Flexibility: Custom breakpoints enable you to make precise design decisions, resulting in a more polished and professional appearance.

Modifying Bootstrap Breakpoints

To customize Bootstrap breakpoints, you’ll need to override the default values for the grid breakpoints. Here’s how you can do it:

Step 1: Modify Sass Variables

Bootstrap can be customized using Sass (Syntactically Awesome Style Sheets), a CSS preprocessor. You’ll need to modify the Sass variables that define the breakpoints. If you’re using the compiled CSS version of Bootstrap, you’ll have to switch to the Sass version.

  1. Install Sass: If you haven’t already, install Sass using the command-line interface.
  2. Download Bootstrap Sass: Download the Bootstrap source files that include Sass files from the official Bootstrap website.
  3. Modify Variables: In the variables.scss file, locate the breakpoints section. You’ll see variables like $grid-breakpoints, which define the breakpoints. Adjust these variables according to your requirements. For instance, to change the medium breakpoint from 768px to 800px:
$grid-breakpoints: (
  xs: 0,
  sm: 576px,
  md: 800px,
  lg: 992px,
  xl: 1200px

Step 2: Compile Sass to CSS

After modifying the Sass variables, you need to compile the Sass files into CSS. Use the Sass command to compile the Bootstrap Sass files:

sass input.scss output.css

Replace input.scss with the path to your main Sass file and output.css with the desired output file name.

Link the compiled CSS file to your HTML document, just like you would with the default Bootstrap CSS.

<link href="path/to/custom-bootstrap.css" rel="stylesheet">

Testing and Refining

After implementing custom breakpoints, thoroughly test your website on various devices to ensure the design remains consistent and user-friendly. Make adjustments if necessary, considering factors like font sizes, element spacing, and navigation menu behavior.


Customizing Bootstrap breakpoints empowers you to take control of your responsive design and tailor it to your project’s unique requirements. By adjusting breakpoints, you can create a more fluid and intuitive user experience that aligns perfectly with your design vision. Remember that while customization offers flexibility, it’s essential to strike a balance between aesthetics and usability, ensuring your website looks and functions flawlessly across the digital landscape. With the power to fine-tune breakpoints, you’re well-equipped to deliver a responsive masterpiece that engages users across a wide range of devices.