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Does CSS letter-spacing Work in HTML Email?
Adjusts the spacing between characters in a text element.
Quick Answer
Does letter-spacing work in HTML email?
The CSS letter-spacing property is supported in all major email clients tested. You can use it with confidence in your HTML emails.
Which Email Clients Support CSS letter-spacing?
CSS support for letter-spacing across email clients
| Email Client | Desktop | Mobile / Web | Notes |
|---|---|---|---|
| Gmail | ✓ Yes | ✓ Yes | — |
| Outlook (Windows) | ~ Partial | ? | — |
| Outlook (Mac / Web) | ✓ Yes | ✓ Yes | — |
| Apple Mail | ✓ Yes | ✓ Yes | — |
| Yahoo! Mail | ✓ Yes | ✓ Yes | — |
| Samsung Email | ? | ✓ Yes | — |
| Thunderbird | ✓ Yes | ? | — |
| ProtonMail | ✓ Yes | ✓ Yes | — |
| Fastmail | ✓ Yes | ? | — |
Notes
- #1 Partial. Big negative values are rendered differently from CSS standards.
- #2 Buggy. Values set in `em` are smaller than the expected render in CSS.
Frequently Asked Questions
Related CSS Properties
Test Your Email Now
Paste your HTML and see how it renders in clients that don't support letter-spacing.