CSS Properties

text-justify

CSS property · 0 supported, 4 partial, 13 unsupported across 21 clients

As of Sep 2, 2026, text-justify fails or degrades in 21 of 21 email clients, treat it as progressive enhancement, never structure.

0/7 webmail, 0/6 desktop, 0/8 mobile clients support text-justify fully.
Unsupported in Gmail Android, Gmail iOS, Outlook Classic, Outlook iOS and 9 more.
Partial in Gmail, Outlook 365, Outlook (New), Yahoo Mail, behavior differs from browsers, test before relying on it.
Outlook Classic (Word engine, supported to at least 2029) does not fully support text-justify, and its replacement changes little here; see the deprecation diff.
Across all clients, only 6 of 298 tracked HTML/CSS features render identically everywhere.

Source: caniemail.com (MIT), via the Emailens engine. Last tested upstream Apr 17, 2024, synced by Emailens Sep 2, 2026.

Client Support

Client	Category	Engine	Support
Gmail	webmail	Gmail Web	Partial^{See caveat 1}
Gmail Android	mobile	Gmail Mobile	Unsupported^{See caveat 2}
Gmail iOS	mobile	Gmail Mobile	Unsupported^{See caveat 2}
Outlook 365	webmail	Outlook Web	Partial^{See caveat 1}
Outlook (New)	desktop	Outlook Web	Partial^{See caveat 3}
Outlook Classic	desktop	Microsoft Word	Unsupported^{See caveat 4}
Outlook iOS	mobile	Outlook Mobile	Unsupported^{See caveat 2}
Outlook Android	mobile	Outlook Mobile	Unsupported^{See caveat 2}
Outlook for Mac	desktop	WebKit	Unsupported^{See caveat 2}
Apple Mail	desktop	WebKit	Unsupported^{See caveat 2}
Apple Mail iOS	mobile	WebKit	Unsupported^{See caveat 2}
Yahoo Mail	webmail	Yahoo	Partial^{See caveat 5}
Yahoo Mail Android	mobile	Yahoo	Unsupported^{See caveat 2}
Yahoo Mail iOS	mobile	Yahoo	Unsupported^{See caveat 2}
Samsung Mail	mobile	Samsung	Unsupported^{See caveat 2}
Thunderbird	desktop	Gecko	Unknown
HEY Mail	webmail	WebKit	Unknown
Proton Mail	webmail	Proton	Unsupported
AOL Mail	webmail	AOL	Unsupported^{See caveat 6}
Fastmail	webmail	Fastmail	Unknown
Superhuman	desktop	Blink	Unknown

Documented caveats (6)

1.Gmail, Outlook 365: Partial. Depends on browser support
2.Gmail Android, Gmail iOS, Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail: Buggy. text-justify is stripped
3.Outlook (New): Partial. text-justify is stripped except when the value is inter-character
4.Outlook Classic: Buggy. text-justify values none, inter-word and distribute are replaced with inter-ideograph
5.Yahoo Mail: Partial. Depends on browser support Partial. text-justify is stripped except when the value is inter-word or distribute
6.AOL Mail: Partial. Depends on browser support Partial. text-justify is stripped except when the value is inter-word or distribute Buggy. text-justify is stripped

Caveats recorded by caniemail.com (MIT) and carried verbatim, one entry per wording rather than per client.

Client-by-client behaviour for text-justify

Partial support (4): Gmail, Outlook 365, Outlook (New), Yahoo Mail. Expect rendering quirks unique to each engine. Partial support typically means a subset of values, an ignored shorthand, or sanitizer-specific rewrites.

No support (13): Gmail Android, Gmail iOS, Outlook Classic, Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail, Proton Mail, AOL Mail. Plan fallbacks for these clients before relying on text-justify in production sends.

Behaviour unverified in: Thunderbird, HEY Mail, Fastmail, Superhuman.