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Font unicode-range subsetting

A @font-face descriptor defines the set of Unicode codepoints that may be supported by the font face for which it is declared. The descriptor value is a comma-delimited list of Unicode range values. This hint informs browsers if the font can support their language.

Last updated on : 2026-02-09

Browser Versions

Edge

Firefox

Chrome

Safari

Opera

5.5 - 8

9 - 11

12 - 16

17 - 144

2 - 43

44 - 150

4 - 35

36 - 147

3.2 - 9

10 - 26.3

9.5 - 12

15 - 22

23 - 125

Fully Supported

Partially

No Support

Formal Definition

Initial value

U+0-10FFFF

Computed value

as specified

Related at-rule

@font-face

Specifications

CSS Fonts Module Level 4 # unicode-range-desc

Syntax

/* <unicode-range> values */
 unicode-range: U+26;
 /* single codepoint */
 unicode-range: U+0-7F;
 unicode-range: U+0025-00FF;
 /* codepoint range */
 unicode-range: U+4??;
 /* wildcard range */
 unicode-range: U+0025-00FF, U+4??;
 /* multiple values */

Browser Compatibility

Font unicode-range subsetting on IE is partially supported on 9-11, and not supported on 5.5-8 IE versions.

Font unicode-range subsetting on Edge is fully supported on 17-144 and partially supported on 12-16 Edge versions.

Font unicode-range subsetting on Firefox is fully supported on 44-150, and not supported on 2-43 Firefox versions.

Font unicode-range subsetting on Chrome is fully supported on 36-147 and partially supported on 4-35 Chrome versions.

Font unicode-range subsetting on Safari is fully supported on 10-26.3 and partially supported on 3.2-9 Safari versions.

Font unicode-range subsetting on Opera is fully supported on 23-125, partially supported on 15-22, and not supported on 9.5-12 Opera versions.

Font unicode-range subsetting on Safari on iOS is fully supported on 10-26.3 and partially supported on 3.2-9 Safari on iOS versions.

Font unicode-range subsetting on Android Browser is fully supported on 97-144 and partially supported on 2.3-4 Android Browser versions.

Font unicode-range subsetting on Opera Mobile is fully supported on 64-80, and not supported on 10-12 Opera Mobile versions.

Font unicode-range subsetting on Chrome for Android is fully supported on all Chrome for Android versions.

Font unicode-range subsetting on Firefox for Android is fully supported on all Firefox for Android versions.

Font unicode-range subsetting on Samsung Internet is fully supported on 5-29 and partially supported on 4-4 Samsung Internet versions.

Browser Support for Font unicode-range subsetting

Font unicode-range subsetting on Chrome

Font unicode-range subsetting on Safari

Font unicode-range subsetting on Firefox

Font unicode-range subsetting on Internet Explorer

Font unicode-range subsetting on Opera

Font unicode-range subsetting on Edge

References

Data sourced from

100

High

Overall Browser Compatibility Score

Note:Font unicode-range subsetting shows a browser compatibility score of 100. 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.