CSS font-feature-settings

Method of applying advanced typographic and language-specific font features to supported OpenType fonts.

Spec	https://w3.org/TR/css3-fonts/#font-rend-props
Status	W3C Candidate Recommendation

IE	Edge	Firefox	Chrome	Safari	Opera
			98
		95	97
		94	96	TP
11	95	93	95	15	80
10	94	92	94	14.1	79
9	93	91	93	14	78
8	92	90	92	13.1	77
Show all
7	91	89	91	13	76
6	90	88	90	12.1	75
5.5	89	87	89	12	74
	88	86	88	11.1	73
	87	85	87	11	72
	86	84	86	10.1	71
	85	83	85	10	70
	84	82	84	9.1	69
	83	81	83	9	68
	81	80	81	8	67
	80	79	80	7.1	66
	79	78	79	7	65
	18	77	78	6.1	64
	17	76	77	6	63
	16	75	76	5.1	62
	15	74	75	5	60
	14	73	74	4	58
	13	72	73	3.2	57
	12	71	72	3.1	56
		70	71		55
		69	70		54
		68	69		53
		67	68		52
		66	67		51
		65	66		50
		64	65		49
		63	64		48
		62	63		47
		61	62		46
		60	61		45
		59	60		44
		58	59		43
		57	58		42
		56	57		41
		55	56		40
		54	55		39
		53	54		38
		52	53		37
		51	52		36
		50	51		35
		49	50		34 (*)
		48	49		33 (*)
		47	48		32 (*)
		46	47 (*)		31 (*)
		45	46 (*)		30 (*)
		44	45 (*)		29 (*)
		43	44 (*)		28 (*)
		42	43 (*)		27 (*)
		41	42 (*)		26 (*)
		40	41 (*)		25 (*)
		39	40 (*)		24 (*)
		38	39 (*)		23 (*)
		37	38 (*)		22 (*)
		36	37 (*)		21 (*)
		35	36 (*)		20 (*)
		34	35 (*)		19 (*)
		33 (*)	34 (*)		18 (*)
		32 (*)	33 (*)		17 (*)
		31 (*)	32 (*)		16 (*)
		30 (*)	31 (*)		15 (*)
		29 (*)	30 (*)		12.1
		28 (*)	29 (*)		12
		27 (*)	28 (*)		11.6
		26 (*)	27 (*)		11.5
		25 (*)	26 (*)		11.1
		24 (*)	25 (*)		11
		23 (*)	24 (*)		10.6
		22 (*)	23 (*)		10.5
		21 (*)	22 (*)		10.0-10.1
		20 (*)	21 (*)		9.5-9.6
		19 (*)	20 (2,*)		9
		18 (*)	19 (2,*)
		17 (*)	18 (2,*)
		16 (*)	17 (2,*)
		15 (*)	16 (2,*)
		14 (1,*)	15
		13 (1,*)	14
		12 (1,*)	13
		11 (1,*)	12
		10 (1,*)	11
		9 (1,*)	10
		8 (1,*)	9
		7 (1,*)	8
		6 (1,*)	7
		5 (1,*)	6
		4 (1,*)	5
		3.6	4
		3.5
		3
		2

Safari on iOS	Opera Mini	Android Browser	Blackberry Browser	Opera Mobile	Android Chrome	Android Firefox	IE Mobile	Android UC Browser	Samsung Internet	QQ Browser	Baidu Browser	KaiOS Browser
15	all	94	10 (*)	64	94	92	11	12.12	15.0	10.4	7.12	2.5
14.5-14.8		4.4.3-4.4.4 (*)	7	12.1			10		14.0
14.0-14.4		4.4 (*)		12					13.0
13.4-13.7		4.2-4.3		11.5					12.0
Show all
13.3		4.1		11.1					11.1-11.2
13.2		4		11					10.1
13.0-13.1		3		10					9.2
12.2-12.5		2.3							8.2
12.0-12.1		2.2							7.2-7.4
11.3-11.4		2.1							6.2-6.4
11.0-11.2									5.0-5.4
10.3									4 (*)
10.0-10.2
9.3
9.0-9.2
8.1-8.4
8
7.0-7.1
6.0-6.1
5.0-5.1
4.2-4.3
4.0-4.1
3.2

Notes

Whenever possible, font-variant shorthand property or an associated longhand property, font-variant-ligatures, font-variant-caps, font-variant-east-asian, font-variant-alternates, font-variant-numeric or font-variant-position should be used. This property is a low-level feature designed to handle special cases where no other way to enable or access an OpenType font feature exists. In particular, this CSS property shouldn't be used to enable small caps.

1. From Gecko 2.0 (Firefox 4.0) to Gecko 14.0 (Firefox 14.0) included, Gecko supported an older syntax, slightly different from the modern one: https://hacks.mozilla.org/2010/11/firefox-4-font-feature-support/

2. Partial support in older Chrome versions refers to lacking support in Mac OS X.

^* Partial support with prefix.

Bugs

• IE10 and 11 do not always appear to support the ss01 value correctly.

• IE10 and 11 on Windows 7 can hide the text under certain circumstances.

Resources

• Demo pages (IE/Firefox only)
• Mozilla hacks article
• Detailed tables on accessability support
• WebPlatform Docs
• MDN Web Docs - font-feature-settings
• OpenType layout feature tag registry
• Syntax for OpenType features in CSS (Adobe Typekit Help)