Set a subject line and preheader text for your HTML emails

You can set a subject line and preheader for your emails before exporting them to production-ready HTML code.

Before you export your HTML emails from Emailify, you can optionally set the subject line and preheader text by populating the Subject Line and Preheader Text inputs in the export panel, after clicking the Export HTML button in the plugin header menu.

Subject Line ​

The subject line will be added to the <title> tag in your exported HTML's <head></head> tag (which will be used as the browser tab name if the email is "viewed in the browser"); it will also be used to set the subject line in your email marketing platform if you're using a built-in Emailify upload integration (and if the email marketing platform API supports setting the subject line).

Preheader Text ​

The preheader text will be used as the text that's seen next to your subject line when the email is viewed inside the inbox of an email client; it will automatically inject your preheader text inside of an invisible <div> tag, so it won't be visible when viewing the email, but it will be shown in the inbox preview as the first text content that it reads from the HTML.

If you've already set the preheader text in Emailify, you don't need to set it again in your email marketing platform, or this may double up the preview text when you send out the email.

Klaviyo preview text should only be set in one place ​

If you're uploading to Klaviyo, set the preview text either in Emailify or in Klaviyo's own preview text field, but not both. Using both can duplicate the inbox preview text or cause Klaviyo to override the preheader embedded by Emailify.

If you want Emailify to control the inbox preview, enter the preheader in Emailify and leave Klaviyo's own preview text field empty. If your workflow requires using Klaviyo's field instead, leave Emailify's preheader blank for that export.

Add extra whitespace to the preheader text ​

You can optionally include the whitespace preheader trick to reduce the chance of body content appearing after your intended preview text in the recipient's inbox. Turn on Add Whitespace to Preview Text in the email export options and Emailify will add a separate hidden compatibility spacer after your preheader text.

The spacer uses a mix of invisible characters for broader support across email clients. It is only added when the email has non-empty preheader text, and it remains a best-effort compatibility technique because inbox and email-marketing-platform behavior can change.

If you use an email marketing platform's own Preview Text field, avoid setting the same preview text in both places. Some platforms automatically add their own spacing, which can duplicate or override the preview text embedded by Emailify.

If Klaviyo or another email marketing platform is still showing extra body copy after your intended preview text, turn on Add Whitespace to Preview Text and re-export the email before testing again.