<wbr>
HTML element · 15 supported, 1 partial, 4 unsupported across 21 clients
15 of 21 email clients render <wbr> fully (Sep 2, 2026 data); it breaks outright in Gmail iOS, Outlook (New), Outlook Classic and 1 more.
- 6/7 webmail, 3/6 desktop, 6/8 mobile clients support <wbr> fully.
- Unsupported in Gmail iOS, Outlook (New), Outlook Classic, HEY Mail.
- Partial in Gmail Android, behavior differs from browsers, test before relying on it.
- Outlook Classic (Word engine, supported to at least 2029) does not fully support <wbr>, 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 Feb 28, 2019, synced by Emailens Sep 2, 2026.
Client Support
| Client | Category | Engine | Support |
|---|---|---|---|
| Gmail | webmail | Gmail Web | Supported |
| Gmail Android | mobile | Gmail Mobile | PartialSee caveat 1 |
| Gmail iOS | mobile | Gmail Mobile | Unsupported |
| Outlook 365 | webmail | Outlook Web | Supported |
| Outlook (New) | desktop | Outlook Web | Unsupported |
| Outlook Classic | desktop | Microsoft Word | Unsupported |
| Outlook iOS | mobile | Outlook Mobile | Supported |
| Outlook Android | mobile | Outlook Mobile | Supported |
| Outlook for Mac | desktop | WebKit | Supported |
| Apple Mail | desktop | WebKit | Supported |
| Apple Mail iOS | mobile | WebKit | Supported |
| Yahoo Mail | webmail | Yahoo | Supported |
| Yahoo Mail Android | mobile | Yahoo | Supported |
| Yahoo Mail iOS | mobile | Yahoo | Supported |
| Samsung Mail | mobile | Samsung | Supported |
| Thunderbird | desktop | Gecko | Supported |
| HEY Mail | webmail | WebKit | Unsupported |
| Proton Mail | webmail | Proton | Supported |
| AOL Mail | webmail | AOL | Supported |
| Fastmail | webmail | Fastmail | Supported |
| Superhuman | desktop | Blink | Unknown |
Documented caveats (1)
- 1.Gmail Android: Partial. Supported with non Google accounts only.
Caveats recorded by caniemail.com (MIT) and carried verbatim, one entry per wording rather than per client.
Client-by-client behaviour for <wbr>
Fully supports <wbr> (15): Gmail, Outlook 365, Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail, Thunderbird, Proton Mail, AOL Mail, Fastmail.
Partial support (1): Gmail Android. Expect rendering quirks unique to each engine. Partial support typically means a subset of values, an ignored shorthand, or sanitizer-specific rewrites.
No support (4): Gmail iOS, Outlook (New), Outlook Classic, HEY Mail. Plan fallbacks for these clients before relying on <wbr> in production sends.
Behaviour unverified in: Superhuman.
Fixes & Workarounds
Gmail iOS
Unsupported`<wbr>` is not supported in this email client.
Outlook (New)
Unsupported`<wbr>` is not supported in this email client.
Outlook Classic
Unsupported`<wbr>` is not supported in this email client.
HEY Mail
Unsupported`<wbr>` is not supported in this email client.
Gmail Android
Partial`<wbr>` is not supported in this email client.
Related Features
Check your own HTML for <wbr>
Paste your own, or run the sample below. Analyzed in this page, with no signup and nothing stored.
Test your <wbr> layout across 21 email clients
Preview rendering, catch CSS issues, and see how <wbr> displays across Outlook, Gmail, and Apple Mail. Free, no account needed.
Instant live preview · No signup required · 21 email engines
Last tested upstream: · Last synced by Emailens:
caniemail.com (MIT) records Feb 28, 2019 as the last time <wbr> was tested in a real client, 7 years before this sync. Syncing copies that result forward, it does not re-test it. Carried in @emailens/engine data v0.12.2.