Website Font Checker Tool Online

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Detect what fonts any website uses. See Google Fonts, Adobe Fonts, self-hosted fonts, and system fonts — with weights, source, and where they're used on the page.

Enter a website to detect its fonts:

How the Website Font Checker Works

This tool analyzes a webpage's HTML and CSS to identify all font references:

  1. Enter a URL — the tool fetches the page's full HTML source code.
  2. Scan for fonts — it checks Google Fonts API links, Adobe Fonts/Typekit includes, @font-face declarations, CSS font-family properties, and font file URLs.
  3. Identify sources — each font is categorized by source: Google Fonts, Adobe Fonts, self-hosted, system font, or CSS declaration.
  4. Report results — fonts are listed with their source, weights, category, and any warnings (like Google Fonts privacy issues or too many font files).

Why Website Fonts Matter for Performance

Typography choices directly impact load time, user experience, and even legal compliance:

  • Page load speed — each font file adds 20-100KB+ to your page weight. Loading 4 weights of one font family can add 200-400KB. Fewer fonts = faster pages.
  • Cumulative Layout Shift (CLS) — when web fonts load after the page renders, text can reflow and shift. This hurts Core Web Vitals and user experience. Using font-display: swap or preloading critical fonts helps.
  • GDPR compliance — loading fonts from Google's servers transmits visitor IP addresses to Google without explicit consent. Self-hosting fonts eliminates this privacy concern.
  • Brand consistency — knowing exactly which fonts your site loads (and what fallbacks are in place) ensures consistent typography across devices and browsers.
  • Accessibility — font size, weight, and readability directly impact how accessible your content is. Understanding your font stack helps ensure readable typography for all users.

Pair this with the Website Technology Checker for a full tech stack analysis, the Meta Tag Checker to verify your page's SEO elements are properly configured, and the Performance Checker to see how font loading affects your overall TTFB and resource weight. If you're auditing for accessibility, the Color Contrast Checker verifies that your chosen font colors meet WCAG standards.

Font Loading Best Practices

Follow these guidelines for optimal font performance:

  • Self-host your fonts — download font files and serve them from your own domain. Better privacy, better caching, fewer DNS lookups.
  • Use variable fonts — a single variable font file can contain all weights and styles, replacing 4-8 separate files. Significant size savings.
  • Limit font weights — only load the weights you actually use. Most sites need 2-3 weights (regular, medium/semibold, bold).
  • Preload critical fonts — use <link rel="preload"> for above-the-fold fonts to prevent layout shift.
  • Use font-display: swap — shows a fallback font immediately, then swaps to the web font once loaded. Prevents invisible text.

Font Checker: FAQ

What does this website font checker do?
This tool scans any webpage and identifies all fonts used on it. It detects Google Fonts, Adobe Fonts (Typekit), self-hosted @font-face fonts, and system fonts referenced in CSS. For each font, it shows the source, category, font weights, and where on the page it is used.
How does the font detection work?
The tool fetches the page's HTML and CSS, then scans for font references: Google Fonts API links, Adobe Fonts/Typekit includes, @font-face declarations, CSS font-family properties, and font file URLs (.woff2, .woff, .ttf). It parses font names, weights, and sources from each reference.
Can it detect fonts loaded by JavaScript?
Partially. If fonts are referenced in the initial HTML or inline CSS, they will be detected. Fonts loaded dynamically by JavaScript after page render (like some custom font loaders) may not be detected since the tool only analyzes the static HTML response.
Why does it warn about Google Fonts?
Loading fonts from Google's servers (fonts.googleapis.com) sends visitor data to Google with each page view. A German court ruled this violates GDPR without user consent. Additionally, self-hosted fonts are often faster due to browser cache partitioning. The tool flags this so you can consider self-hosting.
What is a font stack?
A font stack is the list of fonts in a CSS font-family declaration (e.g., "Inter, Helvetica, Arial, sans-serif"). The browser tries each font in order and uses the first one available on the user's device. A good font stack always ends with a generic family (serif, sans-serif, monospace) as a fallback.
How many font files is too many?
Each font file adds a network request and download time. As a general rule, keep it under 5-6 font files total. Each weight (400, 500, 700) and style (normal, italic) is a separate file. If you see 10+ font files, consider reducing weights or using variable fonts.
What are system fonts vs web fonts?
System fonts (Arial, Helvetica, Georgia, Segoe UI) are pre-installed on the user's device and require no download. Web fonts (Google Fonts, custom @font-face fonts) are downloaded from a server, giving more design flexibility but adding load time. Many modern sites use system font stacks for performance.
Can I use this for competitor research?
Yes. Enter a competitor's URL to see exactly which fonts they use, how they load them, and what weights they include. This is useful for understanding design choices and for finding fonts you might want to use in your own projects.
Is this font checker free?
Yes. Completely free, no signup, no limits, and no ads. Built for designers, developers, and anyone curious about website typography.
Does this tool store the sites I check?
No. The tool fetches the page, analyzes fonts, and returns results. We do not store URLs, HTML content, or font data.

Need Help with Web Typography?

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