Comparison of browser engines (typography support)

This article compares web typography support for several browser engines.

Explanation of the tables[edit]

Engine	Status	Embedded in
WebKit	Active	Safari browser, plus all browsers hosted on the iOS App Store.
Blink	Active	Google Chrome and other web browsers based on Chromium, such as Microsoft Edge, Opera, and Brave.
EdgeHTML	Active	Universal Windows Platform apps; formerly in the Edge browser^[1].
Gecko	Active	Firefox browser and Thunderbird email client, plus forks like SeaMonkey and Waterfox.
KHTML	Active	Konqueror browser
Presto	Discontinued	Formerly used as Opera's browser engine, prior to the migration to Chromium and Blink.
Trident	Discontinued	Internet Explorer and versions of Microsoft Outlook prior to Outlook 2007.

Values[edit]

These indicate the level of support for the given item in each engine. By default, the most recent version of the engine is implied. However, a specific version number can be listed; when this indicates full support, it's the initial version of the engine fully supporting the item.

Legend
Value	Meaning
Yes	Fully supported
No	Has never been supported
Partial	Only some values are supported
Incorrect	Not implemented correctly in all cases
Experimental	May be incomplete or buggy
Nightly build	Currently in development; full support is expected
Depends	Only supported for the specified conditions
Dropped	No longer supported

Support for CSS font resources[edit]

CSS3 specified a mechanism for downloading and displaying fonts within a web page.^{[spec 1]} This table compare support for that mechanism. Note that Embedded OpenType (EOT) font download does not bring in the entire OpenType font and therefore, the most prominent feature of Open Type, ligature support, does not come with EOT. Trident before version 5.0 supports only EOT. EOT is not sufficient for smartfonts that rely on ligatures.

		Trident^{[m 1]}	Gecko^{[g 1]}	WebKit^{[w 1]}	Presto^{[p 1]}^{[p 2]}
Grammar and rules
CSS3	`@font-face`	<3.1^{[IE 4.0]}	1.9.1	525^{[note 1]}	2.2
Descriptors
CSS3	`font-family`	<3.1^{[IE 4.0]}	1.9.1	525	2.2
	`src`	Partial^{[note 2]}
	`font-style`	<3.1^{[IE 4.0]}
	`font-weight`	<3.1^{[IE 4.0]}
	`font-stretch`	5.0^{[m 3]}	9.0^{[g 2]}	No^{[w 6]}	No
	`unicode-range`	5.0^{[m 3]}	Experimental^{[g 3]}	Partial^{[note 3]}	No
	`font-variant`	No	24.0^{[g 4]}	No	No
	`font-feature-settings`	6.0^{[m 4]}	Experimental^{[g 5]}	No	No

Support in HTML and XML documents[edit]

This table compares support for font formats applied with the @font-face rule in HTML and XML documents.

Format			Trident/EdgeHTML	Gecko	WebKit	Blink
EOT	Embedded OpenType		<3.1^{[m 5]}	No^{[g 6]}	No^{[w 8]}	No^{[b 1]}
TTF	TrueType		5.0^{[m 6]}	1.9.1^{[g 7]}	525.26^{[w 9]}	537.36^{[w 9]}
OTF	OpenType		5.0^{[m 6]}	1.9.1^{[g 7]}		537.36^{[w 9]}
SVG	Scalable Vector Graphics		No^{[m 7]}	No^{[g 8]}		No^{[b 2]}
WOFF	Web Open Font Format	1.0	5.0^{[m 8]}	1.9.2^{[g 9]}	534.48.3^{[w 10]}	537.36^{[w 10]}
2.0	Web Open Font Format	14.14316^{[m 9]}	36^{[g 10]}	602.1.50^{[w 11]}	537.36^{[b 3]}

Support in SVG documents[edit]

This table compares support for font formats applied with the @font-face rule in SVG documents.

Format	Trident	Gecko^{[g 11]}	WebKit	Presto
Embedded OpenType (EOT)	No	No^{[g 6]}	No^{[w 8]}	No
TrueType (TTF)		Yes	Yes	2.2
OpenType (OTF)		18.0	No
Scalable Vector Graphics (SVG)		No^{[g 8]}	525
Web Open Font Format (WOFF)		No	No^{[w 10]}	2.7.81

Smart font features support[edit]

Format	Trident	Gecko	WebKit	Presto
OpenType `liga` ligatures^{[spec 2]}	No	2.0	Partial^{[w 12]}	No
OpenType `rlig` ligatures^{[spec 3]}	No		No	No
ZWNJ and ZWJ (Unicode characters used for ligature control)	Yes		Yes	No^{[p 3]}

Notes[edit]

^ Prior to version 4.0, Google Chrome had font support disabled.^{[w 2]}^{[w 3]}^{[w 4]}^{[w 5]}
^ Doesn't understand the format() or local() identifiers.^{[m 2]}
^ Doesn't understand multiple, comma-separated ranges.^{[w 7]}

References[edit]

Specifications

^ CSS Fonts Module Level 3 - Font resources, W3C
^ OpenType Layout tag registry, Tag: 'liga', Microsoft
^ OpenType Layout tag registry, Tag: 'rlig', Microsoft

Trident/EdgeHTML

^ About Font Embedding, Microsoft
^ @font-face support in Internet Explorer, archived from the original on 2010-07-19
^ Internet Explorer Platform Preview Guide for Developers, Microsoft
^ "font-feature-settings property". Microsoft. Retrieved 8 November 2013.
^ About Font Embedding (Internet Explorer), Microsoft
^ Internet Explorer Platform Preview Guide for Developers, Microsoft
^ Best Practices for Getting Started with SVG – IEBlog, Microsoft
^ Galineau, Sylvain (2010-04-23), Meet WOFF, The Standard Web Font Format, Microsoft
^ Olivier, Frank (2016-05-03), Speed up page load with WOFF 2.0 fonts in Microsoft Edge - Microsoft Edge Dev BlogMicrosoft Edge Dev Blog, Microsoft

Gecko

WebKit

^ Hyatt, Dave (2007-10-03), Downloadable Fonts, Apple
^ Issue 9633: Disable web fonts by default, Google, 2009-04-01
^ Full pass of acid3 - Chromium-dev, Google, 2009-07-03
^ Issue 17818: Enabled dynamic / web font support in a secure manner, Google, 2009-07-27
^ Irish, Paul (2010-01-25), Chrome and @font-face: It's here!
^ Bug 12530 - CSS3: Support the font-stretch property, WebKit
^ @font-face support in Safari, archived from the original on 2010-01-19, retrieved 2010-02-17
^ ^a ^b Bug 20542 - Adding EOT Font Rendering capability, WebKit
^ ^a ^b Changeset 29012 – WebKit, WebKit
^ ^a ^b ^c >31302 – Add WOFF support for @font-face, WebKit
^ Safari 10.0, Apple
^ On Safari, ligatures may be switched on with the CSS setting text-rendering, but then, they are used indiscriminately even when letter-spacing is increased (see Fraktur letterspacing); on Google Chrome, ligatures do not work.

Blink

Presto

^ Mills, Chris (2008-12-04), Opera Presto 2.2 and Opera 10 — a first look, Opera, archived from the original on 2010-02-10, retrieved 2010-02-16
^ Seven Web Fonts showcases, Opera, 2009-09-01, archived from the original on 2010-02-14, retrieved 2010-02-17
^ When letter-spacing is increased, these characters are spacing.

^ Mackie, Kurt (10 December 2018). "Microsoft Edge Browser To Get New Rendering Engine but EdgeHTML Continues". Redmond Mag. Retrieved 21 December 2019.

[12] Prior to version 4.0, Google Chrome had font support disabled.^{[w 2]}^{[w 3]}^{[w 4]}^{[w 5]}

[14] Doesn't understand the format() or local() identifiers.^{[m 2]}

[20] Doesn't understand multiple, comma-separated ranges.^{[w 7]}

[2] CSS Fonts Module Level 3 - Font resources, W3C

[42] OpenType Layout tag registry, Tag: 'liga', Microsoft

[44] OpenType Layout tag registry, Tag: 'rlig', Microsoft

[trident-font-face-3] About Font Embedding, Microsoft

[13] @font-face support in Internet Explorer, archived from the original on 2010-07-19

[ie9-preview-15] Internet Explorer Platform Preview Guide for Developers, Microsoft

[22] "font-feature-settings property". Microsoft. Retrieved 8 November 2013.

[ms-eot-24] About Font Embedding (Internet Explorer), Microsoft

[ms-ttf-28] Internet Explorer Platform Preview Guide for Developers, Microsoft

[ms-svg-31] Best Practices for Getting Started with SVG – IEBlog, Microsoft

[34] Galineau, Sylvain (2010-04-23), Meet WOFF, The Standard Web Font Format, Microsoft

[37] Olivier, Frank (2016-05-03), Speed up page load with WOFF 2.0 fonts in Microsoft Edge - Microsoft Edge Dev BlogMicrosoft Edge Dev Blog, Microsoft

[4] @font-face, Mozilla

[16] Bug 3512 - (font-stretch) Implement font-stretch property, Mozilla

[18] Bug 475891 - implement unicode-range support in user font set, Mozilla

[21] Bug 549861 - (font-variant) implement parsing of font feature properties, Mozilla

[23] Bug 511339 - implement experimental support for -moz-font-feature-settings, Mozilla

[moz-eot-25] Bug 520357 - support new web font format (EOT Lite) in @font-face, Mozilla

[gecko-ttf-otf-29] 70132 - Support @font-face, Mozilla

[moz-svg-32] Bug 119490 - Implement SVG fonts, Mozilla

[gecko-woff1-35] Mozilla Supports Web Open Font Format - The Mozilla Blog, Mozilla

[gecko-woff2-38] Firefox 35 for developers - Mozilla &#x007c MDN, Mozilla

[41] Bug 468237 - SVG image using a font specified via @font-face doesn't use the font after it loads, Mozilla

[5] Hyatt, Dave (2007-10-03), Downloadable Fonts, Apple

[8] Issue 9633: Disable web fonts by default, Google, 2009-04-01

[9] Full pass of acid3 - Chromium-dev, Google, 2009-07-03

[10] Issue 17818: Enabled dynamic / web font support in a secure manner, Google, 2009-07-27

[11] Irish, Paul (2010-01-25), Chrome and @font-face: It's here!

[17] Bug 12530 - CSS3: Support the font-stretch property, WebKit

[19] @font-face support in Safari, archived from the original on 2010-01-19, retrieved 2010-02-17

[webkit-eot-26] Bug 20542 - Adding EOT Font Rendering capability, WebKit

[webkit-svg-30] Changeset 29012 – WebKit, WebKit

[webkit-woff1-36] >31302 – Add WOFF support for @font-face, WebKit

[webkit-woff2-39] Safari 10.0, Apple

[43] On Safari, ligatures may be switched on with the CSS setting text-rendering, but then, they are used indiscriminately even when letter-spacing is increased (see Fraktur letterspacing); on Google Chrome, ligatures do not work.

[blink-eot-27] 14948 - Support sites using EOT fonts and font encoding with the on-the-fly transformation to Unicode with an extension - chromium - Monorail, Chromium

[blink-svg-33] SVG (1.1) Fonts - Chrome Platform Status, Google

[blink-woff1-40] Chromium Blog: Chrome 36 Beta: element.animate(), HTML Imports, and Object.observe(), Chromium

[6] Mills, Chris (2008-12-04), Opera Presto 2.2 and Opera 10 — a first look, Opera, archived from the original on 2010-02-10, retrieved 2010-02-16

[7] Seven Web Fonts showcases, Opera, 2009-09-01, archived from the original on 2010-02-14, retrieved 2010-02-17

[45] When letter-spacing is increased, these characters are spacing.

[1] Mackie, Kurt (10 December 2018). "Microsoft Edge Browser To Get New Rendering Engine but EdgeHTML Continues". Redmond Mag. Retrieved 21 December 2019.

[1]

[spec 1]

[m 1]

[g 1]

[w 1]

[p 1]

[p 2]

[note 1]

[note 2]

[m 3]

[g 2]

[w 6]

[g 3]

[note 3]

[g 4]

[m 4]

[g 5]

[m 5]

[g 6]

[w 8]

[b 1]

[m 6]

[g 7]

[w 9]

[m 7]

[g 8]

[b 2]

[m 8]

[g 9]

[w 10]

[m 9]

[g 10]

[w 11]

[b 3]

[g 11]

[spec 2]

[w 12]

[spec 3]

[p 3]

[w 2]

[w 3]

[w 4]

[w 5]

[m 2]

[w 7]

v t e Browser engines
Active	Blink EdgeHTML Gecko Goanna NetSurf Servo WebKit
Discontinued	KHTML Mariner Presto Tasman Tkhtml Trident
Comparisons	General info Support HTML CSS graphics typography

Comparison of browser engines (typography support)

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