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The font-size CSS property sets the size of the font. Changing the font size also updates the sizes of the font size-relative cssxref <length> units, such as em, ex, and so forth.
Last updated on : 2023-02-27
Browser Versions
IE
Edge
Firefox
Chrome
Safari
Opera
Fully Supported
Partially
No Support
font-size on IE is fully supported on all IE versions.
font-size on Edge is fully supported on all Edge versions.
font-size on Firefox is fully supported on all Firefox versions.
font-size on Chrome is fully supported on all Chrome versions.
font-size on Safari is fully supported on all Safari versions.
font-size on Opera is fully supported on all Opera versions.
font-size on Safari on iOS is fully supported on all Safari on iOS versions.
font-size on Android Browser support is currently unknown.
font-size on Opera Mobile is fully supported on all Opera Mobile versions.
font-size on Chrome for Android is fully supported on all Chrome for Android versions.
font-size on Firefox for Android is fully supported on all Firefox for Android versions.
font-size on Samsung Internet is fully supported on all Samsung Internet versions.
Data sourced from
Overall Browser Compatibility Score
Note:font-size shows a browser compatibility score of 92. This is a collective score out of 100 to represent browser support of a web technology. The higher this score is, the greater is the browser compatibility. The browser compatibility score is not a 100% reflection for every browser and the web technology support. However, it does give you an estimate on how much you should rely on a particular web technology in terms of browser compatibility.
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