Create & Preview Email Preheader Text Generate email preheader text with inbox preview and ready-to-use HTML code.

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Email Preheader Generator

Generate email preheader text with inbox preview and ready-to-use HTML code.

Enter subject line

Add your email subject line for context.

Write preheader text

Craft your preheader text (40-90 characters ideal).

Copy HTML code

Copy the hidden HTML div code for your email template.

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What Is Email Preheader Generator?

The Email Preheader Generator helps you create the preview text that appears after the subject line in email inboxes. Preheader text is a second chance to convince someone to open your email — it provides additional context and can significantly boost open rates. This tool shows a realistic inbox preview mockup so you can see how your subject line and preview text work together, suggests proven templates, and generates the hidden HTML code that embeds the text in your email template.

Why Use Email Preheader Generator?

Realistic inbox preview showing subject + preheader together
Character count with ideal length guidance (40-90 chars)
Ready-to-paste hidden HTML preheader code
Suggested preheader text templates
Works with any email service provider

Common Use Cases

Email Campaigns

Add compelling preheader text to marketing emails.

Newsletter Optimization

Improve newsletter open rates with optimized preview text.

Transactional Emails

Provide context for order confirmations and notifications.

Welcome Series

Make welcome emails stand out in crowded inboxes.

Technical Guide

Email preheader text is typically implemented as a hidden div at the top of the email HTML body. The CSS uses display:none, max-height:0, max-width:0, and overflow:hidden to make the text invisible in the email body while remaining visible in inbox previews. Most email clients display 35-90 characters of preheader text, with mobile showing less and desktop showing more. If no preview text is set, email clients pull the first text from the email body — which is often "View in browser" or navigation text. Our generator creates the standard hidden div approach compatible with all major email clients.

Tips & Best Practices

1
Complement the subject line — don't repeat it
2
Front-load the most compelling information
3
Keep preheader text between 40-90 characters
4
Use the preheader to add urgency or a secondary benefit
5
Test different preheaders alongside your A/B subject line tests

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Frequently Asked Questions

Q What is preheader text?

Preheader text is the preview text shown after the subject line in email inboxes. It gives recipients additional context about the email content.

Q How long should preheader text be?

Aim for 40-90 characters. Mobile clients show about 35-40 characters, while desktop can show up to 90+.

About This Tool

Email Preheader Generator is a free online tool by FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration or installation required.