Website Font Detector
Find the fonts any website uses
What Is the Website Font Detector?
The Website Font Detector renders a page and reads the font family of every piece of visible text, weighted by how much text uses it. It names each family, where it's served from, the weights, sizes and line heights in use and what each one is used for, checks that the browser actually loaded it, and lists the font files downloaded, with CSS font stacks ready to copy.
Key Features
Read From the Rendered Page
The page opens in a browser, fonts get time to load and the page is scrolled so lazy sections render. Then the tool walks the visible text and records the family, weight, size and line height of each element, counting characters, so a family that sets the whole body outweighs one used for a single badge. Families the CSS declares but no text uses never appear.
Where Each Font Comes From
Knowing a site uses Inter is half the answer. Knowing it loads Inter from Google Fonts in four weights is the other half. The source comes from the stylesheets and the font files the browser fetched. A family the page asks for but never loads is flagged, because visitors see the next font in the stack instead.
Font Checks Worth Acting On
Every weight and style is another file to download, and text can stay invisible while it loads. The checks count families and files, look for font-display: swap or optional on each @font-face rule they can read, and make sure every stack ends in a generic family like sans-serif, so text still renders if every named font fails.
Common Use Cases
- Identifying a typeface you like on another site
- Recreating a site's type scale in a design file or CSS
- Counting how many font files your own pages load
- Checking that your web fonts load and fall back cleanly
Frequently Asked Questions
Is the Website Font Detector free?
Yes. It's free with a ProxyHorizon account, and every account gets 25 runs a day shared across all our data tools. You can read about the tool without signing in, but running it needs an account because each run fetches live data.
Can it identify fonts in images or logos?
No. It reads text the browser renders, so lettering inside images, logos drawn as SVG shapes and text in a canvas or video isn't identified. For those you need a font matcher that works from a picture.
Why does a font say Third-party CDN or Unknown?
The source comes from where the font file was downloaded. When a site serves fonts from its own CDN on another domain, the tool sees the files but no known font service, so it says third-party CDN. Unknown means no file could be matched to the family, often because the stylesheet lives on a domain the page isn't allowed to read.
Does it tell me if I can use the font?
It tells you where the font comes from, not its licence. Google Fonts families are open source and free to use. A family from Adobe Fonts or a self-hosted commercial typeface needs a licence of its own.
Do you keep the scan?
For 24 hours. One render of the page feeds the colour, font, logo, design system and brand tools, so running another of them on the same page that day is instant. It only holds what the public page shows, so anyone checking the same page that day gets the same scan. Choose "Scan again now" whenever you want a fresh one. We also log which tool you ran and when, to apply the daily limit.
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