What Is Preview Text?
Preview text is the short line of text that appears next to or below your email subject line in an inbox. If you do not set preview text in Knak, email clients will automatically generate it from your email content.
Why It Matters
It influences whether someone opens your email
It supports your subject line with more context
It helps you highlight key messaging early
Without control, email clients may display unwanted text such as “View this email in your browser.”
Add Preview Text in Knak
Knak gives you full control over your preview text.
Steps to Add Preview Text
Open your email in Knak
Click the Email Details and locate the Preview Text field
Enter your desired preview text
How Knak Handles Preview Text
Knak ensures your preview text displays correctly across inboxes.
Key Behaviors
Inserts your custom preview text at the top of the email
Adds hidden spacing after the text
Prevents unwanted content from appearing
This keeps your message clean and consistent across email clients.
How Preview Text Appears in Inbox Views
After you add preview text, it displays next to your subject line in inboxes across different email clients. Each client shows the same message, but the visible length may vary.
Your subject line appears first
Your custom preview text appears beside or below it
No unwanted text is included
Gmail:
Outlook Web:
Outlook App:
Best Practices for Preview Text
Follow these guidelines for better performance:
Length Guidelines
Minimum: 15 characters
Recommended: 40–80 characters
Avoid exceeding 80 characters
Some email clients will cut off longer text.
Writing Tips
Support your subject line
Add urgency or value
Avoid repeating the subject line
Keep it clear and concise
Need more help? Contact support via live chat within Knak using the chat bubble in the bottom right corner or email support@knak.com