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HTML Elements

<input type="radio">

HTML element · 16 supported, 1 partial, 3 unsupported across 21 clients

16 of 21 email clients render <input type="radio"> fully (Oct 14, 2026 data); it breaks outright in Outlook Classic, HEY Mail, Proton Mail.

  • 5/7 webmail, 3/6 desktop, 8/8 mobile clients support <input type="radio"> fully.
  • Unsupported in Outlook Classic, HEY Mail, Proton Mail.
  • Partial in Thunderbird, behavior differs from browsers, test before relying on it.
  • Outlook Classic (Word engine, supported to at least 2029) does not fully support <input type="radio">, one of the few features its replacement actually fixes; 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 Sep 10, 2019, synced by Emailens Oct 14, 2026.

Client Support

ClientCategoryEngineSupport
GmailwebmailGmail WebSupported
Gmail AndroidmobileGmail MobileSupported
Gmail iOSmobileGmail MobileSupported
Outlook 365webmailOutlook WebSupported
Outlook (New)desktopOutlook WebSupported
Outlook ClassicdesktopMicrosoft WordUnsupported
Outlook iOSmobileOutlook MobileSupported
Outlook AndroidmobileOutlook MobileSupported
Outlook for MacdesktopWebKitSupported
Apple MaildesktopWebKitSupported
Apple Mail iOSmobileWebKitSupported
Yahoo MailwebmailYahooSupported
Yahoo Mail AndroidmobileYahooSupported
Yahoo Mail iOSmobileYahooSupported
Samsung MailmobileSamsungSupported
ThunderbirddesktopGeckoPartialSee caveat 1
HEY MailwebmailWebKitUnsupported
Proton MailwebmailProtonUnsupported
AOL MailwebmailAOLSupported
FastmailwebmailFastmailSupported
SuperhumandesktopBlinkUnknown

Documented caveats (1)

  1. 1.Thunderbird: Buggy. Interacting with the element submits the form it belongs in.

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

Client-by-client behaviour for <input type="radio">

Fully supports <input type="radio"> (16): Gmail, Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, Samsung Mail, AOL Mail, Fastmail.

Partial support (1): Thunderbird. Expect rendering quirks unique to each engine. Partial support typically means a subset of values, an ignored shorthand, or sanitizer-specific rewrites.

No support (3): Outlook Classic, HEY Mail, Proton Mail. Plan fallbacks for these clients before relying on <input type="radio"> in production sends.

Behaviour unverified in: Superhuman.

Fixes & Workarounds

Outlook Classic

Unsupported

`<input type="radio">` is not supported in this email client.

HEY Mail

Unsupported

`<input type="radio">` is not supported in this email client.

Proton Mail

Unsupported

`<input type="radio">` is not supported in this email client.

Thunderbird

Partial

`<input type="radio">` is not supported in this email client.

Related Features

<hr> <img> <input type="checkbox"> <input type="hidden"> <input type="reset"> <input type="submit"> <input type="text"> <link>

Check your own HTML for <input type="radio">

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Zero-Friction Engine Preview

Test your <input type="radio"> layout across 21 email clients

Preview rendering, catch CSS issues, and see how <input type="radio"> 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 Sep 10, 2019 as the last time <input type="radio"> 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 v0.14.5.