grid-template-columns
CSS property · 8 supported, 0 partial, 13 unsupported across 21 clients
8 of 21 email clients render grid-template-columns fully (Sep 2, 2026 data); it breaks outright in Gmail, Gmail Android, Gmail iOS and 10 more.
- 2/7 webmail, 4/6 desktop, 2/8 mobile clients support grid-template-columns fully.
- Unsupported in Gmail, Gmail Android, Gmail iOS, Outlook 365 and 9 more.
- Outlook Classic (Word engine, supported to at least 2029) does not fully support grid-template-columns, 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 Jan 9, 2023, synced by Emailens Sep 2, 2026.
Client Support
| Client | Category | Engine | Support |
|---|---|---|---|
| Gmail | webmail | Gmail Web | Unsupported |
| Gmail Android | mobile | Gmail Mobile | Unsupported |
| Gmail iOS | mobile | Gmail Mobile | Unsupported |
| Outlook 365 | webmail | Outlook Web | Unsupported |
| Outlook (New) | desktop | Outlook Web | Unsupported |
| Outlook Classic | desktop | Microsoft Word | Unsupported |
| Outlook iOS | mobile | Outlook Mobile | Unsupported |
| Outlook Android | mobile | Outlook Mobile | Unsupported |
| Outlook for Mac | desktop | WebKit | Supported |
| Apple Mail | desktop | WebKit | Supported |
| Apple Mail iOS | mobile | WebKit | Supported |
| Yahoo Mail | webmail | Yahoo | Unsupported |
| Yahoo Mail Android | mobile | Yahoo | Unsupported |
| Yahoo Mail iOS | mobile | Yahoo | Unsupported |
| Samsung Mail | mobile | Samsung | Supported |
| Thunderbird | desktop | Gecko | Supported |
| HEY Mail | webmail | WebKit | Supported |
| Proton Mail | webmail | Proton | Supported |
| AOL Mail | webmail | AOL | Unsupported |
| Fastmail | webmail | Fastmail | Unsupported |
| Superhuman | desktop | Blink | Supported |
Client-by-client behaviour for grid-template-columns
Fully supports grid-template-columns (8): Outlook for Mac, Apple Mail, Apple Mail iOS, Samsung Mail, Thunderbird, HEY Mail, Proton Mail, Superhuman.
No support (13): Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook Classic, Outlook iOS, Outlook Android, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail, Fastmail. Plan fallbacks for these clients before relying on grid-template-columns in production sends.
Fixes & Workarounds
Gmail
Unsupported"grid-template-columns" is not supported in this email client.
Gmail Android
Unsupported"grid-template-columns" is not supported in this email client.
Gmail iOS
Unsupported"grid-template-columns" is not supported in this email client.
Outlook 365
Unsupported"grid-template-columns" is not supported in this email client.
Outlook (New)
Unsupported"grid-template-columns" is not supported in this email client.
Outlook Classic
Unsupported"grid-template-columns" is not supported in this email client.
Outlook iOS
Unsupported"grid-template-columns" is not supported in this email client.
Outlook Android
Unsupported"grid-template-columns" is not supported in this email client.
Yahoo Mail
Unsupported"grid-template-columns" is not supported in this email client.
Yahoo Mail Android
Unsupported"grid-template-columns" is not supported in this email client.
Yahoo Mail iOS
Unsupported"grid-template-columns" is not supported in this email client.
AOL Mail
Unsupported"grid-template-columns" is not supported in this email client.
Fastmail
Unsupported"grid-template-columns" is not supported in this email client.
Related Features
Check your own HTML for grid-template-columns
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Test your grid-template-columns layout across 21 email clients
Preview rendering, catch CSS issues, and see how grid-template-columns 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 Jan 9, 2023 as the last time grid-template-columns was tested in a real client, 3 years before this sync. Syncing copies that result forward, it does not re-test it. Carried in @emailens/engine data v0.12.2.