How To Boost Website Speed With CSS Font Display – You Should Know

As a website owner, you know how crucial it is to have a fast website. Website speed affects user experience and plays a significant role in SEO rankings. One of the ways to improve website speed is by using CSS Font Display.

Here we will discuss how CSS Font Display can help boost your website speed and improve user experience. We will examine the differences in font rendering today, font download timelines, and which font-display option is right for you.

We’ll dive into each of the five font-display options: auto, block, swap, fallback, and optional and explain what they mean. We will explore browser support for CSS Font Display and provide a demo to help you get started.

How To Boost Website Speed With CSS Font Display

Boosting Website Speed With CSS Font Display

Boosting website speed is essential for improving user experience. Regarding typography, CSS font display is an excellent tool to achieve this goal. The font-display property enables web designers to choose how to load fonts efficiently on their site, thus prioritizing content and improving loading times.

In addition, font swaps can happen quickly with CSS font display, reducing the time for users to see the content. Fallback fonts can help maintain a consistent design aesthetic while enhancing website speed.

With CSS font display, you can optimize your web typography across all browsers and devices, providing a better user experience for everyone.

Differences In Font Rendering Today

Differences In Font Rendering Today

Effective font rendering is crucial in website design, as it can significantly affect website speed and performance. While various techniques are available for this purpose, CSS font display gives web designers more control over how fonts are loaded and displayed on their websites.

Websites can ensure better user experience and search engine rankings by optimising font loading using the CSS font-display property. It is vital to note that different browsers support CSS font display differently; hence considering appropriate fallbacks is necessary for better accessibility.

Font Download Timelines

Font Download Timelines

You can control how fonts are loaded and displayed on your website using the font-display property. This allows you to show fallback fonts while custom fonts load, optimizing font download timelines for better speeds. Each value font display has a different timeline that affects user experience, so it’s essential to choose wisely.

Users will experience faster typography without flashing invisible text or FOIT/FOUC issues by reducing load times with this property. With URL declarations for web fonts like WOFF and SVG with @font-face rules, browser support is available in Chrome, Firefox and MS Edge.

Which Font Display Is Correct For You?

The choice of font display ultimately depends on your website’s design and goals. If you have a simple website with limited typography, the swap value might be the best option. This value shows fallback fonts until the custom one is fully loaded, providing a better user experience.

However, the optional or fallback value might be more effective if your website has multiple fonts or complex typography. These values ensure that custom fonts load quickly, showing fallbacks only when necessary. Overall, CSS font display is an excellent tool for optimizing web typography performance while maintaining design aesthetics.


The ‘font-display’ property auto’ value optimizes web font loading behaviour for better performance. Setting this value for your web fonts allows browsers to use their default behaviour to display text content smoothly while downloading fonts in the background.

During this process, an invisible text period ensures immediate text rendering using a fallback or system font until your custom web fonts are fully loaded. This prevents layout instability issues and enhances page speed and overall user experience.


When using the block font-display property value in CSS, web designers have more control over how fonts are loaded and displayed on their websites. To optimize your site’s performance, choosing the right font-display option is crucial based on your website’s design and user experience goals.

A swap period is a good candidate if you want to prioritize text content over page loading time, while a fallback font face is ideal to ensure your fonts are visible even if they take longer to download. The second block period can be used for decorative fonts that aren’t critical for your site’s functionality.


Choosing the appropriate font-display property is vital in enhancing the user experience on your website. To prioritize speed over visual consistency while loading fonts, use the swap value of the font-display property.

This option loads a substitute font while your preferred font downloads in the background. Conversely, to ensure visual consistency before showing any text content, use the fallback value of font display. Make sure to experiment with different values of the font-display property to achieve an equilibrium between performance and design.



Selecting the appropriate fallback font-display value can be a challenging task. To assist you with this, we have laid out three essential factors to remember when making this decision: Font-display: swap is an excellent choice if you prioritize quick page load times, while Font-display: fallback ensures consistent font rendering.

Additionally, Font-display: optional strikes a balance between speed and consistency.  It’s important to remember that picking the correct font display depends on your website’s particular needs and priorities.

By implementing one of these three descriptors into your CSS and customizing it using secondary keyterms like URL, swap period or block period, you’ll see an improvement in your website’s performance and readability.


Choosing the correct font-display property value that aligns with your website’s design and content is crucial to optimise website speed. Opt for “swap” if you prioritize immediate visibility of text; use “fallback” or “optional” if you have slow-loading fonts; or go for “block” if you prefer hiding text until the entire webpage is ready.

While experimenting with various values of the font-display property is recommended, don’t forget to remember that using fallback fonts is a reasonable option too. Remember that it’s seals ntial to choose an appropriate fallback font family and size.

Browser Support For CSS Font Display

Browser Support For CSS Font Display

Browser support for CSS Font Display is essential since not all browsers support it. Although most modern browsers like Chrome, Firefox, and Safari support CSS Font Display, older browsers might not be compatible.

As such, having a reasonable fallback option is necessary in case a user cannot view the fonts on their device due to compatibility issues. Optimizing your website’s font display settings can significantly improve website speed and user experience.

Therefore, testing your website’s font display settings across multiple browsers is vital to ensure consistent performance.

Demo Of CSS Font Display

Demo Of CSS Font Display

A live demo showcasing the advantages of CSS Font Display will conduct to provide an in-depth understanding of this technology. By optimizing font loading and avoiding invisible text or Flash of Unstyled Text (FOUT), web designers can improve website speed significantly.

During the session, we will cover swap, fallback, optional, block and auto font-display values to provide reasonable fallbacks while ensuring that fonts are downloaded correctly.

Additionally, we’ll discuss how browser compatibility impacts font-download timelines. Join us to learn more about implementing CSS Font Display on your website and boosting performance.


CSS font display is an excellent tool to help optimize website speed and improve user experience. Choosing the right font-display option for your website ensures that your fonts load quickly and efficiently without sacrificing quality or visual appeal.

With the various options available, you can specify how a font should be displayed if it is not immediately available to the user using the font-display property. This can help improve your website’s perceived performance and ensure your typography looks consistent across different devices and browsers.

However, it’s essential to use font display wisely and consider the impact on accessibility and user experience. With careful planning and testing, you can use a CSS font display to enhance the design and functionality of your website.

Frequently Asked Questions

What Is Font Display In CSS?

Font display is a CSS property that determines how browsers display fonts on web pages. It controls the length of time before text appears in a fallback font. The five font-display options, including auto and optional, can enhance website speed and user experience.

How To Set The CSS Font Style?

To customize the font style using CSS, apply the “font-family” property and explore other properties like size, weight, style, and variant. Control font display with the “font-display” property. Experiment with various combinations to balance aesthetics and website speed.

Where Do I Put The Font-Display Swap?

When using @font-face, include font-display swap in the CSS code and place it after the src property. Remember to separate properties with a semicolon. You can also add it to a stylesheet that affects multiple pages. The proper implementation ensures optimal font loading and improves user experience.

How Do I Choose A Good Css Font Display?

Choosing the proper CSS font display depends on your website’s design and content. Use “swap” for non-critical fonts and “block” for critical ones. Test different options to find the best fit.

What Are Some Common Font Loading Issues That Can Slow Down A Website?

Font files that are too large or use various font styles/weights can slow down a website. Poorly optimized font display settings can also contribute to slower text rendering. CSS font-display techniques can assist in enhancing website speed and optimizing font loading.

David Egee

David Egee, the visionary Founder of FontSaga, is renowned for his font expertise and mentorship in online communities. With over 12 years of formal font review experience and study of 400+ fonts, David blends reviews with educational content and scripting skills. Armed with a Bachelor’s Degree in Graphic Design and a Master’s in Typography and Type Design from California State University, David’s journey from freelance lettering artist to font Specialist and then the FontSaga’s inception reflects his commitment to typography excellence.

In the context of font reviews, David specializes in creative typography for logo design and lettering. He aims to provide a diverse range of content and resources to cater to a broad audience. His passion for typography shines through in every aspect of FontSaga, inspiring creativity and fostering a deeper appreciation for the art of lettering and calligraphy.

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