Meet the Installed Font Checker
Free font detector: check which of 150+ fonts are installed on your computer or phone, test any font name, preview text in each font and copy the list.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
Found 58 of 153 fonts · Helvetica Neue ✓ · Segoe UI ✗ (a Mac has no Segoe UI).Open the Installed Font Checker
Illustration. Open the tool for the real thing.
What is the Installed Font Checker?
Designers, developers and anyone editing documents need to know whether a font is really installed. This checker tests more than 150 popular system and web fonts — Arial, Helvetica, Segoe UI, Calibri, Roboto, Fira Code, Noto and many more — and shows which ones your device has, with your sample text rendered in each installed font.
Type any font name to check it individually, filter the list, change the preview text and copy the list of installed fonts. Fonts are detected by measuring text width with and without the font, the same technique websites use — which is why your font list is part of your browser fingerprint. Everything runs locally and nothing is uploaded.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
System, Office, developer and web fonts.
Your own sample text in every installed font.
Test a specific font instantly.
Export installed fonts as plain text.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
How it compares
A plain look at this tool next to the usual alternative.
| This utility | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
How does the font checker work?
It draws text in your font and in a fallback font and compares widths — a different width means the font is installed.
Why is a font I installed not detected?
Reload the page, and check that the name matches the family name exactly.
Can websites see my fonts?
Yes, using the same technique, which is why fonts are part of your fingerprint.
Why do I see few fonts in Firefox or Brave?
They limit or randomise font detection to protect privacy.
Does it list every font?
It checks a curated list of 150+ common fonts plus any name you type.
More free tools
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Try the Installed Font Checker now
Find out which fonts are installed on your device and preview them. Free to use.
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