Email Client Preview Generator
Simulate realistic inbox reading panes, subject truncation, and mobile lock screen push notifications across Gmail, Apple Mail, and Outlook.
Email Client Preview Generator — Test Outlook, Gmail & iOS Mail: Free Email Client Preview Generator tool: preview how emails look inside realistic Gmail webmail, Outlook desktop, Apple Mail iOS, and mobile lock screen.
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How to Preview Emails Across Mail Clients
Enter Envelope Metadata
Input your sender display name, from address, subject line, and preheader snippet text.
Select Inbox Shell
Switch between Gmail Webmail, Apple iPhone Lock Screen notification, and Microsoft Outlook.
Audit Preheader Snippets
Verify that your secondary preheader copy flows naturally alongside the subject line without awkward truncation.
Refine Length for Mobile
Ensure the primary call to action is visible before mobile notification banners cut off the preview.
The Power of the Inbox Envelope: Sender, Subject & Preheader
In email marketing, the envelope refers to the three elements visible to a subscriber before they ever open your email: the Sender Name, the Subject Line, and the Preheader Snippet. Mastering this triad is essential because subscribers spend an average of only 3 to 4 seconds scanning their inboxes before deciding which emails to open, delete, or flag as spam.
The Strategic Importance of Preheader Text
Preheader text (also known as the snippet or preview text) is the short line of text extracted by email clients that displays immediately following the subject line in the inbox list view. If you do not explicitly declare a preheader in your HTML template, email clients automatically scrape the first text found in the body—often resulting in awkward, unprofessional snippets such as:
Snippet: Can't see images? View in browser. Unsubscribe here.
By injecting a hidden preheader <div style="display:none;max-height:0px;overflow:hidden;">, you can control the exact message subscribers see on their lock screens and inbox rows.
Character Display Thresholds by Platform
| Mail Client / Interface | Subject Line Limit | Preheader Snippet Limit | Sender Name Truncation |
|---|---|---|---|
| Apple iPhone Lock Screen | 38 – 42 characters | 75 – 90 characters (2 lines) | 24 characters |
| Gmail Webmail (Desktop) | Shared with snippet (~110 chars total) | Fills remaining horizontal row width | 180px fixed width column |
| Microsoft Outlook Desktop | 50 – 70 characters | 50 – 80 characters | Full name displayed in reading pane |
Key Benefits of the Email Client Preview Generator
iOS Lock Screen Simulation
Accurately preview Apple Mail push notification styling, typography, and two-line preheader truncation.
Gmail Webmail Inbox Row
Test how subject lines and preview text sit alongside sender names in Gmail's primary desktop inbox view.
Outlook Desktop Reading Pane
Audit Microsoft Outlook enterprise layout headers, avatar circles, and sender display formats.
Real-Time Synchronized Editing
Type in any field and watch changes instantly reflect across all desktop and mobile previews simultaneously.
Prevent Embarrassing Preheaders
Ensure subscribers never see default boilerplate text like 'View in browser' or 'Click here to unsubscribe'.
100% Client-Side Privacy
Pre-launch product announcements and subject drafts remain completely private on your local machine.
Frequently Asked Questions
<div style="display:none;max-height:0px;overflow:hidden;mso-hide:all;">Your custom preheader text here...</div>. This ensures the text shows in the inbox list but remains invisible inside the email body.