How to use a custom font in your emails

You can apply a custom font across every email Instant AI generates, either by picking a Google Font or uploading your own font file. Once set, your font applies everywhere — every heading, paragraph, and button — so your emails match your brand typography in the email clients that support it.

This sits on top of the default font you already have set. If a recipient opens your email in a client that supports web fonts, they'll see your custom font. If their client doesn't, Instant falls back to your default font automatically, so no one ever sees broken or missing text.

Where to find it

Go to Settings > Email Settings > Style and scroll down to the fonts section. Under Custom Font (Optional), you'll see two options:

Google Font — pick any font from the Google Fonts library
Upload Font — upload your own font file (WOFF2 format)

Option 1: Google Font

Select Google Font, pick any font from the dropdown, and save. No hosting or configuration needed.

Option 2: Upload Font

Select Upload Font to open the upload modal. From here:

Enter a Font Name
Pick the weight (e.g. Regular 400, Bold 700) and upload the matching WOFF2 file
To add more weights of the same font family, click + Add weight and upload each weight's file
Click Save font

Use this option when your brand font isn't available on Google Fonts, for example a custom foundry font or a licensed typeface. You'll need a WOFF2 file for each weight you want to use.

How it works

Default Font: always set. Renders for every recipient and acts as the fallback.
Custom Font (Optional): one Google Font or one uploaded font, applied across every email element on top of the default. Renders for recipients in clients that support web fonts.

Once saved, your custom font applies across Flows, Campaigns, and Signup Forms.

Which email clients render custom fonts?

Will render your custom font:

Apple Mail (macOS and iOS)
Outlook for Mac
Samsung Mail
Android Mail

Will fall back to your default font:

Gmail (web, iOS, Android)
Outlook for Windows
Yahoo Mail
AOL

This is a limitation of those email clients, not Instant. Gmail and a few others strip @font-face declarations from any email they render, regardless of which ESP sent it. Every email platform works within the same constraint.

Tips for picking fonts

Pick a default font that visually pairs with your custom font, since a large portion of your list will see the fallback. For Google Fonts, stick with widely used options for the most reliable rendering. For uploaded fonts, make sure you have rights to use the font in email and that you've uploaded the weights your templates actually use.