Test font stacks and see exactly which fallback font renders for each character in your text.
Font Fallback Tester applies a CSS font-family stack to sample text and identifies the font that renders each character. This exposes mixed-font runs, such as Latin letters coming from the preferred family while a currency sign, mathematical symbol, or another script comes from a fallback. The common surprise is that fallback is not one decision for the entire string. Because the test runs in the current browser, its findings reflect the fonts and generic-family mappings available in that environment.
A font-family value is an ordered list of family names and generic families. For each character needing a glyph, browser font selection can reach a later family when an earlier choice is unavailable or lacks suitable coverage. The tester reports the selected font by character, making the point where a text run changes fonts visible.
Visible text does not always correspond to one independent Unicode code point per glyph. Combining marks, variation selectors, ligatures, and joined emoji sequences can participate in a single displayed unit. Read the character-level result as a fallback diagnostic for the supplied text, not as proof that every displayed shape was selected or drawn independently.
Font availability, font versions, browser choices, and platform mappings for generic families can differ. A stack ending in sans-serif may resolve to different concrete faces on two systems, and those faces may cover different Unicode ranges. No, a result from one device is not a universal prediction for every visitor.
No. The report applies only to the characters and environment tested. Include representative accented letters, punctuation, numerals, symbols, emoji, and scripts used by the product. A font may render ordinary Latin text while falling back for one combining mark, uncommon symbol, or joined sequence, so a short ASCII sample is insufficient.
The behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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