*Important to note: Customers will need to ensure they have licenses for any fonts used in their account.
What Are Web Safe Fonts?
Web safe fonts are a small set of fonts commonly available across devices. These fonts are:
Pre-installed with most operating systems
Supported by all major email clients and browsers
Common web safe fonts include:
Arial
Courier
Georgia
Helvetica
Lucida Sans
Tahoma
Times New Roman
Trebuchet MS
Verdana
When Can You Use Web Fonts?
Web fonts expand your design choices. These are downloaded by the browser or email client when needed and are not installed on a device. Popular sources include Google Fonts.
Supported file formats:
WOFF2
WOFF
TTF
OTF
Email Clients That Support Web Fonts
Desktop:
Apple Mail (macOS)
Legacy Outlook for Mac
Hey for Desktop
Mobile:
iOS Mail
Samsung Email
Not supported:
Outlook
Gmail (mobile and desktop)
Font Stacks and Fallback Fonts
Because of limited support, Knak uses font stacks. These ensure your emails fall back to a safe font if the custom one isn’t supported.
Example (as shown in the editor):
Common Font Stack Examples
Web Font | Fallback Stack |
Bitter | Georgia → Times → Times New Roman → serif |
Droid Serif | Georgia → Times → Times New Roman → serif |
Lato | Tahoma → Verdana → Segoe → sans-serif |
Open Sans | Helvetica Neue → Helvetica → Arial → sans-serif |
Roboto | Tahoma → Verdana → Segoe → sans-serif |
Source Sans Pro | Tahoma → Verdana → Segoe → sans-serif |
Montserrat | Trebuchet MS → Lucida Grande → Lucida Sans Unicode → sans-serif |
Ubuntu | Tahoma → Verdana → Segoe → sans-serif |
These stacks are optimized for font shape and size. Fonts like Lobster are not included due to limited fallback compatibility.
Japanese Fonts
Knak supports two Japanese font stacks:
ヒラギノ角ゴ Pro W3
→ Hiragino Kaku Gothic Pro → Osaka → メイリオ (Meiryo) → MS PGothic → sans-serif
メイリオ (Meiryo)
→ MS PGothic → ヒラギノ角ゴ Pro W3 → Hiragino Kaku Gothic Pro → Osaka → sans-serif
Need more help? Contact support via live chat using the chat bubble in the bottom right corner or email support@knak.com.