How many email clients support word-break?

It works in 4 of 21, partial in 12, not supported in 5.

Does word-break work in Gmail iOS?

word-break is partly supported in Gmail iOS. Closest to Gmail Android: Gmail iOS, which agrees on 273 of the 300 features both are tested on.

word-break in Gmail Android

Partial word-break is partly supported in Gmail Android.

Buggy.

Works in 4 of 21 · partial in 12 · not supported in 5

Which clients

Works: Gmail, Thunderbird, Fastmail, Superhuman
Partial: Gmail Android, Gmail iOS, Outlook 365, Outlook (New), Outlook iOS, Outlook Android, Outlook for Mac, Apple Mail, Apple Mail iOS, Samsung Mail, HEY Mail, Proton Mail
Not supported: Outlook Classic, Yahoo Mail, Yahoo Mail Android, Yahoo Mail iOS, AOL Mail

Your reader in Gmail Android may not see word-break the way you wrote it, even if it looks right where you tested it.

What to do instead in Gmail Android

Outlook Windows does not wrap a URL on word-break, word-wrap, or overflow-wrap. Insert  in a cell that has a width

instead

8 lines

<table role="presentation" width="100%" cellpadding="0"
  cellspacing="0" border="0">
  <tr>
    <td width="100%">
      https://example.com/&#8203;very/&#8203;long/&#8203;url?token=&#8203;abc123def456
    </td>
  </tr>
</table>

Show the original

before

3 lines

<span style="word-break: break-all;">
  https://example.com/very/long/url?token=abc123def456
</span>

A free account opens all 21 clients and keeps your checks for 7 days. Create a free account →

What Gmail Android does with word-break

caniemail record, tested upstream 15 Feb 2022

Buggy. Supported but a word-wrap:break-word is applied, making it look like break-all.

Your next question

Every feature in Gmail Android · word-break in every client

Questions

How many email clients support word-break?: It works in 4 of 21, partial in 12, not supported in 5.
What do I use instead of word-break in Gmail Android?: Outlook Windows does not wrap a URL on word-break, word-wrap, or overflow-wrap. Insert  in a cell that has a width.
Does word-break work in Gmail iOS?: word-break is partly supported in Gmail iOS. Closest to Gmail Android: Gmail iOS, which agrees on 273 of the 300 features both are tested on.

To see what else in your email Gmail Android does not support, paste the whole email.

Check your email, free

No signup · Five clients free, Outlook Classic included · All 21 with an account

The checker needs a computer screen.

Real captures 14 Oct 2026 on 10 installs · caniemail (MIT) via @emailens/engine 0.18.22 · tested upstream 15 Feb 2022 · data last changed 10 Nov 2026 · Outlook (New) cells are the engine's mapping · the Gmail capture is not counted (it skips Gmail's sanitiser)