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Optimizing Web Fonts

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Summary

Optimizing web fonts means making smart choices about how fonts are prepared and loaded on your website so pages appear quickly and smoothly for visitors. This involves using the right file formats, reducing font sizes, and adjusting loading behavior to avoid delays or blank screens.

  • Choose smaller formats: Convert fonts to modern formats like WOFF2 to shrink file sizes and speed up loading times.
  • Trim unused characters: Remove languages and symbols you won't use to keep font files lightweight and boost site performance.
  • Control loading behavior: Use font-display: swap and preload tags so text appears instantly, then updates with your custom font without causing layout shifts or blank spaces.
Summarized by AI based on LinkedIn member posts
  • View profile for Pavel Karpisek
    Pavel Karpisek

    144% conversions. 12.7x ROI. We turn Webflow sites into revenue engines. | Webflow Enterprise Partner | CRO & AEO

    3,797 followers

    Did you know the font you upload can make or break your site’s performance? At Karpi Studio - Webflow Enterprise Partner, we treat typography not just as design—but as engineering. 1️⃣ Format matters: Use .woff2 instead of .ttf. It’s smaller, faster, and optimized for the web. Always convert before uploading. 2️⃣ Precision matters: Most font files include hundreds of languages you’ll never use. If your site is in English, strip everything else. There’s no reason to load Japanese or Cyrillic when your audience reads English. This is how we reduce 120KB to 15KB per font load, achieving a 100% Google Lighthouse score—improving SEO, speed, and user experience. The screenshot below shows FontForge, where we manually delete all unnecessary characters and re-generate every single font file before uploading it to our clients’ Webflow websites. We do this for every client—by default. It’s not part of any SEO upsell BS package. It's the normal thing to do. That’s how we cut 120KB to 15KB, hit a 100% Google Lighthouse score, and drive faster load times, better SEO, and stronger conversions. In short: small fonts, big impact.

  • View profile for Idil Saglam
    Idil Saglam
    6,283 followers

    Your custom font makes your site look cool. But guess what?
 Your users never see it.
Because you're literally shipping invisible text. By default, browsers wait for your web font to load before painting text.
This means: - Your layout is ready - Your DOM is parsed - But your hero heading?
→ White screen. Zero text. This delay is called FOIT: Flash of Invisible Text.
It destroys your LCP and first paint metrics. And it’s your fault. The fix is stupidly simple: @font-face {  font-family: 'YourFont';  src: url('yourfont.woff2') format('woff2');  font-display: swap; } That’s it. font-display: swap tells the browser:
“Hey, render with fallback font now, swap in the custom one later.” Without this: - Users wait up to 3 seconds staring at a blank hero section. - Your LCP explodes. - Your SEO tanks. - And Lighthouse calls you out like a disappointed parent :) Bonus tip: Always preload fonts with: <link rel="preload" as="font" href="/fonts/yourfont.woff2" type="font/woff2" crossorigin="anonymous"> - Compress fonts (WOFF2 only). - Self-host whenever possible. - Avoid layout shifts by matching fallback font metrics (see font-size-adjust and font-family-stack). This is just one real-world fix from my e-book on browser rendering internals. If this post taught you something, the book will teach you a lot more. (link in bio)

  • View profile for Erwin Hofman
    Erwin Hofman

    Core Web Vitals consultant for ecomm & agencies | Google Developer Expert | audits, talks & in-house training 🎓

    14,957 followers

    𝐏𝐚𝐠𝐞𝐬𝐩𝐞𝐞𝐝 𝐦𝐲𝐭𝐡 𝐛𝐮𝐬𝐭𝐢𝐧𝐠: Have you seen this quick font downloading hack? In #CoreWebVitals blogposts as well as my #pagespeed audits, it keeps coming back 🚀 On top of the main stylesheet.css of a website, such inlined @𝐟𝐨𝐧𝐭-𝐟𝐚𝐜𝐞 declarations can then be found inlined in the <head>. 💡 But here's the catch: While it might seem smart to allow the browser to recognize and download the font files early, it won’t actually speed anything up compared to having them in your main stylesheet.css. Here's why: 1️⃣ Your main stylesheet is still render blocking. → So the browser will wait for that to be fully downloaded anyway. → Thus, placing your @𝐟𝐨𝐧𝐭-𝐟𝐚𝐜𝐞 in a <style> or in the rest of your stylesheet doesn't make a difference. 2️⃣ Browsers try to be efficient → They will only download fonts that are actively associated with DOM nodes of your website → This holds off the download until the browser has confirmed the font is used. → This actually applies to not only font files, but also to bg images in your CSS. 𝐂𝐨𝐧𝐜𝐥𝐮𝐬𝐢𝐨𝐧: In an attempt to improve font loading you can now put this myth to bed. By don't bothering to move those @𝐟𝐨𝐧𝐭-𝐟𝐚𝐜𝐞 inline into your <head>. You're better off using <link rel="preload"> (just for the critical fonts) instead! 😄 Happy optimizing!

  • View profile for Yar Al Roshidi
    Yar Al Roshidi

    Building high-quality digital products

    2,270 followers

    When you upload fonts to Webflow, the file type matters. OTF & TTF are heavy, not built for the web WOFF are compressed, but older WOFF2 are light, modern, and the best choice for performance If you can, always go with WOFF2. And skip the Google Fonts API inside Webflow. Download the font and upload it yourself: This means fewer external requests and faster site. Small detail, big impact.

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