Font Fingerprint Test

Your installed fonts create a unique system signature. Fingerprint systems detect available typefaces by measuring text dimensions and Unicode glyph rendering — no permission needed.

Scanning installed fonts...

Font Metrics Fingerprint

Unicode Glyphs Fingerprint

Fonts Detected

Fonts Tested

Glyphs Tested

Detected Fonts

Not Detected

Unicode Glyph Measurements

How It Works

Font Metrics: A test string is rendered in each font from a dictionary of known typefaces. If the measured width differs from the default fallback font, the font is considered installed. The combination of installed fonts is highly unique per system.

Unicode Glyphs: Special Unicode characters are rendered at a large size and their pixel dimensions are measured. Differences in font rendering engines, hinting, and anti-aliasing across browsers and operating systems produce unique measurement sets — even when the same fonts are installed.