Online Tool Store
Newsletter Preheader Previewer
Preview how a newsletter sender name, subject line, and preheader may appear together in an inbox, entirely in a private browser-only workspace.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
Inbox preview
TodayOnline Tool Store Weekly
9:41 AMFive small changes for a clearer content plan
A quick planning checklist, fresh tools, and one practical idea to try this week.
Example shown — inbox apps trim text differently depending on the device and mailbox.
How it works
- Enter the sender name, subject, and supporting preheader text.
- Review the compact inbox-style preview as you type.
- Move the strongest benefit or call to action to the beginning, where it is less likely to be truncated.
The preview places the sender, subject, and preheader in the same reading order used by most inbox lists. It is a planning aid, not an exact replica of every email client.
FAQ
What is a newsletter preheader?
It is the short line of text many inboxes show beside or below the subject line before a reader opens the email.
How long should preheader text be?
Put the essential message early. Email clients and devices show different amounts of text, so a concise first sentence is usually most reliable.
Does this send or store email content?
No. This is a local preview only; it does not connect to an email provider or upload your copy.
How we compare
| Feature | Online Tool Store | Mailchimp | Litmus |
|---|---|---|---|
| No account needed for a quick draft | Yes | Account required | Account required |
| Local copy preview | Yes | Campaign platform | Testing platform |
For a fast subject-and-preheader review before moving into a delivery platform, this focused local preview is the straightforward choice.