Email Preview Text Checker
Check whether preview text supports the subject, avoids repetition, works on mobile, and does not show random footer or unsubscribe copy.
Start Here
Enter a subject line and preview text and run Email Preview Text Checker.
Review the Preview Text Checker Result
Review the status, warnings, and recommended actions shown in the result panel.
Ready When You Are
Run Email Preview Text Checker to see the Preview Text Checker result and next actions.
About Email Preview Text Checker
Preview text is the short line many inboxes show next to or below the subject. It can clarify the offer, add context, or reduce confusion before the email is opened. The email preview text checker reviews the subject and preview together so they do not repeat each other, leave important context missing, or get cut off too early. Read Write the Subject and Preview Text for examples.
Good preview text is not filler. It should support the subject, set the right expectation, and still make sense on a phone where space is limited. The email preview text checker also helps catch blank preview text and awkward hidden preheader patterns. After improving the preview text, send a test and review mobile rendering with Design for Phones First.
What Email Preview Text Checker Checks
- Preview text length
- Repetition compared with the subject
- Default or footer-like text
- Mobile clipping risk
- Clear next-step guidance
Questions
Is preview text the same as the first sentence?
Sometimes inboxes show the first sentence when no preview text is set. A deliberate preview line usually gives you more control.
Should preview text repeat the subject?
No. Preview text should support the subject with extra context, a reason to open, or a helpful detail.