vw unit

Support for viewport width unit.

Estimated Support About

80.95% supported

Apple Mail

macOS

13

iOS

13

Gmail

Desktop Webmail

2020-02
1

iOS

2020-02

Android

2020-02

Mobile Webmail

2020-02

Outlook

Windows

2003
2007
2010
2013
2016
2019

Windows Mail

2020-02

macOS

2016
16.80

Outlook.com

2020-02
1
2024-01
1

iOS

2020-02

Android

2020-02

Yahoo! Mail

Desktop Webmail

2020-02
1

iOS

2020-02

Android

2020-02

AOL

Desktop Webmail

2020-02
1

iOS

2020-02

Android

2020-02

Samsung Email

Android

9.0

Mozilla Thunderbird

Windows

2020-02

macOS

68.4

ProtonMail

Desktop Webmail

2020-03

iOS

2020-03

Android

2020-03

Fastmail

Desktop Webmail

2021-07

HEY

Desktop Webmail

2020-06

Orange

Desktop Webmail

2020-02
2021-03
2024-04

iOS

2020-02
2024-04

Android

2020-02
2024-04

LaPoste.net

Desktop Webmail

2021-08

SFR

Desktop Webmail

2020-02

iOS

2020-02

Android

2020-02

GMX

Desktop Webmail

2022-08

iOS

2022-08

Android

2022-08

1&1

Desktop Webmail

2022-08

Android

2022-08

Mail.ru

Desktop Webmail

2020-10
1

WEB.DE

Desktop Webmail

2022-08

iOS

2022-08

Android

2022-08

WP.pl

Desktop Webmail

2025-04

Notes

  • 1

    The HTML of the email message is embedded directly on the webmail (not in an <iframe>) and may not fill the full viewport’s width. In this case, the vw values are relevant to the viewport (browser window) not the email message.

Know something we don't?

Is any of the above data outdated? Or do you want to add a new email client to the list? Heads on to GitHub and edit the data file!

Edit this page on GitHub Report an issue on GitHub

Not comfortable with GitHub? Send us an email.

Test it yourself

This feature was last tested on February 25, 2020.

If you want to test this feature in the same conditions as we did, you can get our test code and run a test by yourself. Make sure to follow our testing recommendations first.

View the test code